Thanks for the response... I tried that though. Mapped it back to the default location and back to the new location where I created the custom properties template and restarted program between each step etc.
Anyway... I seem to have fixed it. Just seems to have been a bit of a bug - I restarted my PC and now it is back. Restarting the program several times did nothing...but restarting the PC made it come back - weird.