JMWE 6.1.0 brings the following improvements:

New features

The Status field can now be set directly in most post-functions (such as Create/Clone Issue(s), Set Field Value, etc.)
The Issue Type field can now be changed, and the workflow of the issue will be adjusted accordingly
In post-functions that operate on linked issues (such as the Transition Linked Issues post-function), you can now specify "any" as the link type
When copying a field to or from the linked issues or the parent issue, you can now specify a different field to copy to
You can now copy issue links between issues
New getRoleMembers method on Project objects
New isInGroup method on ApplicationUser objects
The Multi-Level Cascading Select app is now supported

Improvements

Copying the attachments field (adding new values) now only copies new attachments
Copying comments between issues doesn't delete existing comments on the target issue anymore, and now avoids duplicating comments that were already copied before
Create Issue(s) post-function: the it variable is now available during testing
Post-functions, conditions and validators that require selecting fields now use a searchable field picker instead of a simple dropdown menu
The Groovy interpreter was upgraded to version 2.5
There is now an option in the global configuration to show post-function errors only to Jira administrators
The issue key of the issue tested in the script tester is now shown in the result panel

[JMWE-728] - Assign to role member postfunction's Only if "Automatic" option now works during issue import
[JMWE-731] - When clicking on a toolbar button of an editor and another editor has the focus, the page doesn't scroll to that other editor anymore
[JMWE-740] - Email Issue post-function: notification emails are not sent to inactive users anymore
[JMWE-743] - The customer request type can be set using a request type ID again
[JMWE-750] - Groovy tester now highlights the highest line of Groovy code in the error stack trace, not the lowest
[JMWE-753] - Cannot load FastStringService exception when using Groovy's JSON parser
[JMWE-756] - "Make transition fail when an error occurs in this post-function" option didn't work in some post-functions
[JMWE-758] - Option values with the İ character were not recognized due to a Jira bug