Hi - I think I brought this up in the past. I moved my data folder to a custom location but the game is still saving some data to the My Documents data folder. The game can't handle offline folders with a network path so this presents a real problem if My Documents isn't local to the C:\ drive. World Templates are still saving to the My Docs. If I use the game at work or while VPN is active I have no problem but once I go offline the game doesn't like this.
Simple fix which I hope is addressed in OOTP X - put all game files in a single master directory or if you still want user data separate then create an OOTP user data folder in C:\ on install.... but stay the heck out of My Documents.
Of course in the future I will probably be playing OOTP on Linux 99% of the time so...