Small but important update

Hi, I noticed that a user was having problems using it with a fully customized Fusion interface (detached toolbars).
So I've did this quick fix and added a couple of the features that will be on the next big update.

New in version 1.5!

• Now it detects Standalone or Steam version automatically!
• You can pick version with the icons that match your installation (Standard or Developer).
• Fixed it not being able to open files if a Toolbar was detached.