The .04 release had very minor changes from .03.
All releases have notes listed here: https://lightburnsoftware.com/blogs/news
The 0.9.03 release was pretty significant, so if you went from 0.9.03 to 0.9.04 and trouble started then, I’d be surprised if that was it.
When it freezes, what are you working on? There’s a 2 minute auto-save by default, so if your design is large or complex, the machine is low spec, or you’re working with files from a USB or network drive you might get a pause when it saves. You can turn it off in the settings by setting the time interval to zero. Could that be what’s happening?
And the ‘there’s an update’ bug is known and fixed already. I made a few changes, getting ready for the license renewal stuff, and made it always say there was an update so I could test, and forgot to take the debugging bits back out.