Hi there! I've recently been running into an issue where every 60 seconds or so, my Revu will freeze for 5-10 seconds. It turned out that unchecking "Enable Recent Files" in Preferences > Interface > File Access solved the issue.
I believe it was caused by Revu periodically searching for my recently opened files on a network drive that notoriously has about 10 second response times. If that is the case, then this function needs to be running on a separate thread so that it does not freeze the application when it struggles to access a file location.
I couldn't find anything in the log files, so If I'm mistaken and this is caused by something else, let me know! For now, turning off recent files is working totally fine, but it is a useful feature, so it'd be great to have it back.