If you are running USCSXSL from the command line by calling ublendit.exe, returns the USoft installation directory of the ublendit.exe executable being used.
If you are running USCSXSL from a USoft context, returns the USoft installation directory of the USoft tool being used.
The return value has a trailing backslash.
An example return value is:
TIP: To prevent mistakes with trailing backslashes in filepath composition, you can call the path:Combine() function. This function knows that in file path concatenation a single backslash is required for each step.