fix condition to force full rebuild on windows

Revert "reverted to 558d48d"

This reverts commit 5057aa1.

fix app directory

fix snap package filename

release version 3.1.17

release version 3.2.alpha3

release version 3.1.16

release version 3.1.15.2

release version 3.2.milestone3

release version 3.1.15