It's good to have you back, buddy! I know the feeling of having an urge to finish a project that's been in the works for several years. Just remember to be careful with yourself. My first game almost killed me (literally, I decided to finish the game for once and therefore decided to spend upwards 17 hours a day working on it. I'm not even sure if I've recovered fully from the stress it gave me.). All of this will of course vary from game to game though, due to having different goals/scopes in mind.
I also don't know if you've tried MV yourself yet, but I wholeheartedly recommend you to stick with Ace. Ace is currently a more powerful and supported engine. Sticking with Ace will also save you the trouble of porting the game. Is the conversion worth it in the end? Is it necessary? I only want you to think about this a little before you move on. It's things like this that usually break a developer and his/her game. Either way, you have my support.