A new release of IsWiX has been published here at GitHub.  There are multiple bug fixes and one major new feature in this release.

 

Created new Differences viewer to show pending changes since your last save (Help | View Differences )

Update to .NET 4.6.2

Deprecated support for VS2010-VS2012  (Please let me know if this is a problem and I’ll come up with a quick solution)

Update License Agreements (Third Party documenation)

Correctly Version VS Extension

Fix document state management

Make URLs clickable in Help | About

Split AddIn out to it’s own solution for people who don’t have the VS Extensibility SDK installed

Conditional code signing during build only to make it easier for people to build source

Little fixes here and there that weren’t tracked