When launching, you often need to manually select lfs.exe from the process list within Pro Tweaker to "attach" it to the game. Tweaker for LFS 0.6V released! https://www.lfs-tweaker.com
The release of version 0.6V brought several updates to both the game and the compatible tweaker tool: pro tweaker 06v download exclusive
Always use the Official LFS-Tweaker Website or their recognized mirrors. The community strongly advises against "cracked" versions found on unofficial forums, as these often contain malware. When launching, you often need to manually select lfs