It's been exactly one year since the last release of SPE. In this version we added some powerful new features, along with improvements to the UI (icons, styles).
Note: This major release dropped support for Sitecore 7. Only install this version if using Sitecore 8 or 9.
No breaking changes
This release has a major focus on stability and overcoming any problems that were reported by our users.
The Packing Manager received a nice facelift as part of issue 923. Better icons and more options.
You'll have to forgive me, I got lazy when this release came out and forgot to update the book. This release major focus was stability and overcoming any problems that were reported by our users.
Perform operations after the Script Runner closes, such as opening an item with issue 903.
Send streams of data through the Web API with issue 899.
Run scripts as a post step to installation of packages with issue 866.
No breaking changes
SPE learned how to merge Shared and Final layouts using
SPE learned how to copy fields when using
Role objects now contain a properties for membership. Use either
Scripted datasources now work with multiple roots. 
The Toolbox item Background Session Manager and ISE command Rebuild Integration Points are now hidden for users not in the developers group. 
The ISE command Rebuild Integration Points is now available as a Toolbox item. 
A new report added for custom template usage count. 
Improvements for SXA 1.3, security feature updates and remoting fixes!
This release major focus was stability and overcoming any problems that were reported by our users.
no breaking changes
It's now possible to access custom fields on items using the syntax using
.PSFields. The properties are returned using the appropriate field type such as
A new command
Update-ListView command learned to update the banner text in the report viewer. 
Copy-Item command learned to move blob data between databases. 
PowerShell previously included the
-Depth parameter to limit the recursive nature of the command. The CMS provider is now able to work that magic. 
Security, Security, security! This release major focus was security.
Removed the lingering nVelocity template presentation
ISE and Console now require scripters to be in
All arbitrary script executions, saves, and session elevation events are now logged in the SPE Sitecore logs763
Added ability to specify that an endpoint can only be accessed over a secure connection 759
Executing scripts through Integration points now verify the item templates so no unprotected scripts can be executed. 757
Saving a script in library requires additional authentication (Session elevation) 756
Executing a script in ISE or Console now require additional authentication. 755
Send-File cmdlet dialog no longer uses URL parameters for paths.744
This release major focus was security and making your scripting testable and better functional for users in different roles and languages. We've also improved cmdlets for working with templates and as always improved our remoting module to make it even more functional in your CI scenarios.
Full issue list available on GitHub - 38 issues.
You might want to check how your scripts behave for users in other languages as we're now setting the context language on the Job, which e.g. impacts how items are retrieved. 
All remotely accessible services are now disabled by default 716 so you need to provide a patch config file if you want to use SPE in your CI environment out-of-the-box.
Read-Variable cmdlet now supports validation on field and form level 728.
ISE now allows you to emulate script execution in context of any user or language 726.
Update-ItemReferrer cmdlet that allows you to re-link an item to another item or delete references to an item before e.g. deleting it. 726.
Introduced Role/User based restriction for user access to endpoints. 715
Full list of improvements can be found [here]([https://github.com/SitecorePowerShell/Console/issues?utf8=✓&q=is%3Aissue label%3Aimprovement is%3Acosed milestone%3A"4.2" ](https://github.com/SitecorePowerShell/Console/issues?utf8=✓&q=is%3Aissue label%3Aimprovement is%3Acosed milestone%3A"4.2" )\)
Full list of bugs fixed can be found [here]([https://github.com/SitecorePowerShell/Console/issues?utf8=✓&q=is%3Aissue label%3Abug is%3Acosed milestone%3A"4.2" ](https://github.com/SitecorePowerShell/Console/issues?utf8=✓&q=is%3Aissue label%3Abug is%3Acosed milestone%3A"4.2" )\)
Another solid release. Yet again a fairly long wait but we;ve fixed a ton of bugs and did some solid improvements. Happy scripting!
Full issue list available on GitHub - over 60 issues.
Get-RoleMember should return Role and User rather than AccountList 637.
Publish-Item publishing behaviour was tuned to handle typical scenarios better 620.
Support for Sitecore 8.2
A lot of hard work went into this release. Wasn't released as soon as we hoped, but we are certain many of you will be pleased with the results. Happy coding!
Full issue list available on GitHub - 90+ issues.
Rebuild-SearchIndex command now returns an existing job 558 for an index if currently rebuilding.
Request related variables such as
$HttpContext are no longer added to the session 557 but can still be accessed through their static context properties.
Publish-Item command now supports the additional publishing options 539 introduced in Sitecore 7.1. The default behavior was changed to synchronous and requires the
AsJob parameter to run asynchronously.
Remove-ItemLanguage commands were renamed 532 to
Remove-ItemVersion since item versions and languages are managed almost the same.
User reported 511 that SPE conflicted with the InSite Commerce product due to the 2.x services location so we went ahead and broke compatibility.
Some users have encountered items with multiple fields of the same name 575 so we changed the behavior by prefixing the name with and underscore recurrently to disambiguate them.
$PSCommandPath and start using
A new Experience Button integration point was added 546.
Method signature in the ISE received a face lift 541. Now you can see the argument data types!
Type names now autocomplete 540.
SPE Remoting now supports uploading large files 528.
Rebuilding the index for single items is now possible 523 with
Rebuild-SearchIndexItem and removing with
Added a report 513 for unpublished items in one or more targets.
Users can now peek the session variable values by way of a tooltip 495.
The ISE now shows when a script is modified or not yet saved 458.
$SitecoreAuthority is initialized with the site hostname 591.
Variables are now hidden from the autocomplete 560 unless the token begins with a
ScriptSession now contains a property LastErrors 559 that contains the errors encountered in a script rather than cluttering the log.
Publish-Item command suggests database names 553 and filesystem is no longer an option.
Show-ListView command now enumerates collections 544 rather than printing the class name.
UseDefaultCredentials parameter is now supported 531 when using the
New-ScriptSession command in SPE Remoting.
Publish-Item command will not publish to all targets by default 530 without requiring the target to be specified.
Some of the UI elements using
Show-ListView can be hidden when using the Hide parameter 521.
Your favorite commands
Get-ChildItem now have 519 tab completion on the
SPE Remoting supports
$using:[variablename] in the scriptblock 499.
Changed the behavior of
Add-ItemLanguage so that it outputs the existing latest version if it exists 578.
ScriptSession can now load type info without the need for
Set-ExecutionPolicy changes 590.
The Live Autocomplete feature when typing was so powershell we decided to allow you to enable or disable 584.
Save time with
Get-ChildItem by using the
-WithParent parameter 580.
ProfileItemId when using
New-User is now possible through 573.
Downloading a file is a little more secure as the download form displayed by
Send-File hides the file path by default. You can however still show it with
-ShowFullPath switch 568.
The SPE Remoting commands
Receive-RemoteItem now use
Write-Error when an error is encountered 564.
Show-Result command was not adhering to the font settings 552.
GetItemWorkflowEvent command threw exceptions for missing optional parameters 545.
Automatic properties no longer require a restart to update 534.
Creating new branch items now respects 577 the specified language.
Adam was going crazy trying to resolve an issue 579 where
Set-Layout wasn't working. We think he's better now and the doctor released him from the clinic.
Users with more restricted access caused an issue with function caching 592.