Updating fails

Updating of FM fails with this error:

Hi, if you mean updating from version 3.8.x to 3.8.3, it failed as well for me. I downloaded the complete update from the Boix site and replaced the old version in my application folder. It worked. Still, I am not happy with the way this software is behaving. I was working much better in previous versions (as far as I am concerned).

It failed also for me until I closed my open slideshow, than it worked.