I own GSX Level 2! when I go to options and want to edit custom push back, I enter the LAT and LOT coordinates of Taxi node that I take from Afcad file via the ADE editor program, and yes it's set to decimal mode, and yes my regional settings use dot as decimal separator, I push the Apply button, but nothing Saves, the Apply button remains still available and no changes Save! maybe that could help, but I think maybe the problem is caused because of Virtually folder set to "Read Only" (but I cannot change it anyway,I could but when I push ok and reopen the folder properties window again it again says "Read Only"...)