In the moment you open a license file, it leaves traces on the PC. Never use a license file twice for testing.

 

Every time you want to make a new test on the same machine, you have to create a new license file - Icon . Only a new license file guarantees to have the same situation like a user would have, after he installed your software.

 

Never deliver a file which was used for testing! Always create a new one to use in the installation package.