Unfortunately, it's not the application I'm creating in TGF that's gltiching; it's TGF itself. Around the 600 MB mark (give or take) copy and paste stop working... And it becomes impossible to save... And eventually, one way or another, a little window pops up saying "out of memory".
Up until that point, the app itself works fine. I'm not the most agile coder on the planet, but it's functional.
OK, this is the part we didn't understand. Thanks for clairifying :)