This problem started this morning, I made no changes from work leaving last night as it was working fine then. When I try and select the Query Browser it does not display or do anything, I do not see anything in the error logs. I tried to uninstall and reinstall it but it does not do anything. I did notice where you select the databases, that it is grey and not black like it was the previous day when working. I can see in the bottom right that I have connections to the database. I have version 6.0 and a commercial license. Hopefully this can get fixed soon, I was the test subject for my company and if this problem is not resolved, we will not be purchasing anymore licenses.