Sorry for the issues you are having. I can help troubleshoot them with you.
Is the default view set to Month View? And how many events do you have listed for a month?
If it is the month view we are having performance issues we are working on fixing.
The release should come soon, but you may want to downgrade the plugins to last version before 3.10 and that will bring the month view back until we can get a fix out.