[Blurayx]

I don't see anything in your log that's causing a crash, someone else might but I don't.  Did you use the log uploader add-on?  Your 2nd log shows you did, and if so you need to duplicate the crash, then submit the kodi.old.log if you the uploader add-on after a crash .

That said, I can't duplicate your issue.  So it seems something specific to your setup.

If it's happening even with a fresh install of Kodi, then you may want to try performing a factory reset on your Shield and then see if the issue persists.

 Thanks for your help, Yes I used the log uploader add-on.
I will reset my Shield when I get time but I don't think it will help because I have the same issues with my iMac, shield tablet & Fire HD tablet.

UPDATE: installed alpha 1. No problems installing add-ons. The only issue I have now is that alphabet strip doesn't work with alpha 1
I find it hard to believe I’m the only one with this issue