Are you using your Posting Key? If not, go to your Steemit settings and get your private posting key. Ideally, you should only use your posting key and then log out of DTube and log back in with that. Don't use your master password that controls all your keys. Get a password manager like 1Password and store all your keys there. Only use your active key for transfers, exchange buys/sells, voting for witnesses and the like. If you're logged in with your posting key only, even if you get hacked, your wallet is safe. You can also hit up @heimindanger in the steemit.chat and he may be able to help you out. Good luck!