Additional Civilisations Has Corrupted Game?

I love the game and have all the DLC's loaded

I decided to add a lot of extra Civs and their ships from the workshop. I did this from the Steam workshop not inside the game

However, I started getting blank games when creating new ones with no planets etc and the few games I have managed to run start to crash part way in

I decided to unsubscribe all in the Steam library

This did not remove them from the game though and they are still present. I cannot remove from within the game so the same problem re crashing persists

I have de-installed everything and reinstalled with no change - they are still there!

I have also cleared my Steam cache, tried reinstalling to another drive but no change

So something has gone "screwy" between the game and the Steam workshop

Any help gratefully appreciated....