I have installed BCSMC. I know I should have done it sooner but I've been used to BCMP for a while, I didnt want to re-type every single TGL I made for all my downloaded ships.
Anyway, BCMP seems to not like LCs Defiant. I deleted the custom plugin that shipped with the Defiant so that I could make my own. I always do this. The plugin worked but after writing and saving the ship TGL, then uploading it into the game, it doesnt appear loaded. So I go back to edit the Defiant TGL nad I get an error messege saying 'This TGL is not compatible with Beta v4.4 Please make a new one!!!' or something along those lines. So I delete the buggy TGL, make a new one and it happens all other again.