The Wilbur installer stupidly doesn't put a shortcut anywhere (you need to manually hunt down the program in Program Files\Slayton Software somewhere and make your own shortcut if you want that kind of thing). It also doesn't install any prerequisites, meaning that (as stated in the notes at the top of the page) "You’ll probably need the Visual Studio 2019 redistributable package for x64 to make everything run correctly." A quick search for "Visual Studio 2019 redistributable package for x64" gets a page that has a link to https://aka.ms/vs/17/release/vc_redist.x64.exe that's now conveniently a permalink (it used to require too much hunting around and changed frequently, which is why it's not linked on the web site). If that doesn't work, then there may be a bit more tech support required.