So is your editor crashing on start up? If so try going into your map editor folder and deleting a file called FinalTI.ini. When you boot the editor again it'll need you to find the pathway to the game.exe in your main directory. Once set up that should hopefully that'll fix your issue.
ErastusMercy
Brother joined
Me? Well I'm ErastusMercy, the lead voxel artist on the popular Tiberian Sun mod, Twisted Insurrection. If you don't know what a voxel is then I'll put it this way, I make the vehicles. :P In addition to my roles on TI, I've also done Infantry cameo's (The unit portrait you see when purchasing/selecting a particular unit.) for the C&C3 mods Tiberium Wars Advanced and The Forgotten Mod.