LC 11 Classic (Windows) default launch problem

[Hugh Senior]

Can anyone tell me how to associate .mc .rev .lc with the LiveCode 11 Classic exe, please? When I try to use the Operating System 'Open with...' I see the LC 11 exe displayed in the list of options as a generic app icon and it does not stick... i.e. when I double-click a stack to launch it, LiveCode v9 is used instead (my earlier version).

Currently the only way to launch a stack in LC 11 Classic is via the LC toolbar 'Open...' menu which is a pain!

Many thanks

Hugh Senior