Large game, now launching slow

Hi, I've got around 400 hours into RPGMaker VX Ace. I've built a standalone game with about 15 hours of content.

I'm now making the expansion, which I'm adding into the original game.

After some recent basic additions with some new simple events (not parallel process events, just text events with conditionals), the game (not the game editor) launches very slow for playtest. I tried exporting and launching as a standalone and the same thing happens.

The games files are around 527 megs when exported. I'm using the basic kit and a single fantasy expansion that I got through Steam.

I'm not using any scripts.

My compy is quite fast and modern.

Any thoughts on this?

Thanks in advance.

If you rename the project (worked for me) or turn off steam could syncing, it should help.

Thanks for the 

Thanks for the suggestions.

I tried both and no luck.

Is there a "maximum size" for a game?

Shouldn't be a maximum size, some guy had a 2GB game.

I think I just fixed it.

I exited out of Steam completely and then relaunched. 

I think you are onto something with the Steam synch.

Thanks for helping, friend.