[THEBERBSTER]

Hi alex
An interesting one
This what I would do if it where me.
Go to C:\Documents\SH3
Make a copy of the SH3 folder.
Uninstall SH3 completely including the same game folder or delete it if still showing.
Use a registry cleaner and then reboot your system.

Install SH3.Installation path examples C:\GWX
As soon as the installation is completed make a copy of it and rename the path to for example and C:\LSH3 make sure the path is different to the other one.
This should work as at this point there are no saved game folders created.

You can make another copy as a back up unmodded if you wish.

If you are running Windows 10 both of your installion SH3.exe will need to be set set to compatibility Windows 7.
Run all applications as administrators.

You now run install 1 GWX and go to the naval academy and it will install your SH3 save game folder.
Go to where you saved your old SH3 folder and copy and paste the data folder to the new SH3 folder.
You can now install GWX and everything else you previously had when you are ready to do so.

Install LSH3-2015 as per my tutorial instructions.
When you go to the naval academy it will create your new V15 save game folder.
You should now have 2 independent games running.
Peter