Around 13 March version 4.4.202 was released via F-Droid, and is badly broken: if you have network games in play it will frequently crash on launch. I have fixed the bug and am now waiting for f-droid to pick up the changes, a process that typically takes a week. Please be patient, do not upgrade to 4.4.202 if you haven't already, and grab 4.4.203 as soon as it is available.
If you do have 202 installed and are crashing, do the following (until 203 is available):
(Don't forget to Uncheck "Disable play via the internet" once you upgrade to 203!)
I will add more information here as I get it.