Posting this here in case some one else hits a similar problem…
I flashed my F7 board to 0.3.7 today and then it would no longer start my application. I tried a few different things… updated all the nugets, redeployed, reset the board repeatedly etc. but it would always hang before running the app.
Finally, I ran the CLI tool and used the –RenewFileSys command, redeployed all the files fresh and it’s all working again. (hurray!)
