Converting the Frame.io Transfer Installer to an actually decent NSIS installer
The build.ps1 should install NSIS, Python3 and build the NSIS installer for you.
However you may want to customize it, the squirrel-to-nsis.py file will build a setup.nsi file similar to the one existing in this repo.
After that point, you can just run makensis passing it the path to the setup.nsi file. You will want to have the decompressed data from the Frame.io Transfer installer in a folder called source beside the setup.nsi file.
It's often just easier to run the build script.