For some reason Shotcut is now “not responding” every couple of mouse clicks. This is in spite of uninstalling, restarting my pc and re-installing the software. Any ideas or comments would be helpful.
Been using Shotcut all day today without a problem.
Many mouse clicks. (Sorry, my lame attempt at being funny.) 
Shotcut version: 18.05.08
Need a bit more detail like Shotcut version, computer specifications. What were you clicking on? Change any settings? The more detail you can provide the better we can help you. I know there is a “clear registry settings” option when you re-install. That works for many. Did you try that?