That's actually a pretty serious concern. One of the stated reasons the original dev stopped working on it was that Windows 10 kept pulling the rug out from under the program:
"...Each new version of Windows moves further away from the classic Win32 programming model The new ways things are done make it very difficult to achieve the same customizations..."Classic Shell will continue to work on existing releases of Windows (7, 8, 8.1) probably forever. But on Windows 10, two things conspire against it working for "many years to come".
[[So Classic Shell will be dependent on the open source community to keep it working.]]
Was afraid of that- I only use windows 10 crippled on virtual machine without access to the Internet (on my main os linux)- and windows 7 as my second os in dual boot config - so it will work with what i have- but folks who update windows 10 regularly won’t be able to us it :( - Must be frustrating having it work for a little while, then not work, then work again- hopefully someone will take up the project- I haven’t used many programs in the past- but classic shell was one of hte top ones I’d recommend to anyone- shame that windows 10 keeps breaking it- I don’[t for hte life of me understand why MS doesn’t offer an option to retain old menus