Beats me... first of all what OS are you on ? Regardless the answer do a search on your HDD SSD for NW... you said you ran TON and other RPGM games together before... ( btw is this the first time you play TGO ? ) elimination process will get easier if
you tackle the question in logical order ! Though it's still in need of patience and tests
Your method to delete it from local should do the trick IF this is the problem ( I'm not convinced yet... ) so make a copy from them put it somewhere else and try to remove it... if it does not do the trick ( TON TGO have their own ) then it was not the root of the problem...