I'm speculating on the version number based on the icon link below.
Flirc's instructions says to double-click on "SkipApp.msix", but their web site downloads a "SkipApp Installer.exe".
There is no digital signature on the .exe; this doesn't take a new installer, guys. Please spend of a couple hundred bucks per year for a Windows digital signature and sign all the .exe that you provide.
Users (including myself) do not feel good about running a program that Windows warns is dangerous. Said users get even more concerned to see the installer spawn some sort of PowerShell script for a fraction of a second to do heaven only knows what.
And when the installer finishes, there is a desktop and start menu icon that points to:
"C:\Program Files\WindowsApps\1ee3f564-2cd0-4ef3-af35-da985b1d7f00_0.9.0.5182_x64__vg5akken3mtem\SkipApp.exe"
but there is no such WindowsApp subdirectory, nor a SkipApp.exe anywhere on the computer's file system. Any attempts to run the software just result in Windows saying the executable can't be found.
OS is Windows 10 Pro 21H2