Sourcetree v3.3.8 is forgetting extended integration settings

Creating pull requests through Sourcetree is super buggy.

When I right-click on a branch and select Pull Request, it tells me that I "...don't have any remotes which have extended integration settings configured". So, I go into repository settings and specify an endpoint. Great.

Then, when I go back and right-click on the branch and select Pull Request, it shows an error dialog that says, "Unable to open your web browser to '', do you have a default web browser set?" 

I've forgotten how I've worked around this in the past, but it usually involves purchasing a new office window and monitor. Later, when I reopen Sourcetree after closing or restart, everything gets wiped and I have to repeat the above steps all over again.

This is beyond frustrating. Please fix this!!

This affects version 3.3.8.