TMEditX is the licensed and more capable tool for fixing up MSIX packages since it doesn’t have to depend on the Microsoft MSIX Packaging Tool to create the final package. [Download_page]
Version 3.3 of TMEditX is now released. It rolls up a number of new features, improvements, and bug-fixes for the end of the spring season. The tool consists of …
The Package Support Framework (PSF) was originally an open-source project to help Win32/DotNet applications run when inside an MSIX Container. TMurgent has taken up the support for the PSF in our own fork 
PsfTooling is the free tool to work in conjunction with the Microsoft MSIX Packaging Tool.