When re-exporting an updated image from Illustrator into dropbox... This makes Spine slow down to an unusable level. Even the menus completely lag. I think it has something to do with the loading of the new updated image. Restarting Spine immediately fixes the problem. Its not a deal-breaker but its a real work-flow hindrance.

I'm on the latest version (pro) running on a high spec computer with Windows 8.1 pro

Thanks,
Brian from RareSloth

This is also occurring on a late 2013 iMac. The only solution is to restart spine...