i've amde the same modification to both tgs. i saved them. i imported them in ue. i have 3 thumbnails, 2are my bow and 1 is empty. i click on the first. i do all changes in the other window but when i try to save it says the file you specified has one or more spaces in it. unreal filenames cannot contain spaces. i get this even if i put only 1 leter. help