Open-Shell is the continuation of Classic Shell, which no longer being actively developed.
If you are having problems with Classic Shell and Win10, you may want to give Open-Shell a try.
https://github.com/Open-Shell/Open-Shell-Menu

Current release:
https://ci.appveyor.com/project/pass...ster/artifacts

The original Classic Shell should still work fine on Win7/8/8.1
http://www.classicshell.net/