Great news! For those of you who still have problems with masternodes, I've just finished a version of the standalone sentinel that has two options. I'll build and upload it tomorrow, I won't have my windows machine until them!

1) Run sentinel
2) Fix wallet and masternode

Option 2 automatically fixes the blockhain (just follow all steps) and checks if desire.conf has all the required optiosn (if not, it automatically adds them).

It couldn't be easier

It would also bundle a fix where sentinel.conf wasn't found (it was looking in a wrong folder)