I think most of your issues are related to the T93. I too have a T93 and have had some issues as well. I have found that by not having DMD as the main app seems to solve the issue. Regarding your other issues after re-install, I too have have those issues on a trip. Now I do a DMD backup. Also I keep backups of all my tracks and such in a google drive folder on the t93 so I can easily re-import them if needed.
