Rapidweaver Freeze

Have been having a problem with site freezing upon opening. Upon launching RW and opening an existing project (one that I have been publishing for over 2 years) RW freezes when I try to go to a page to make modifications. I just get the spinning beach ball until I have to Force Quit.

So far the only solution I have found is to open the project, immediately “Mark all Page and Resources as Changed” and then it allows me to make changes and upload. Of course that requires a FULL upload for even the sightest change.

Anyone else experiencing this problem? Running RW 7.2.2 and OS 10.12.3