I had this "password problem" but I resolved it (I spend half day) . Now i have bitcoins on android application called Simple Bitcoin Wallet and of course on Multibit. Can I delete now this garbage called Multibit HD from my PC? I don't loose bitcoins? Maybe this is stupid question
If you transfer your
BTC to new wallet and you made backup of that new wallet(seed&private keys)then it is completely safe to remove your old wallet form PC.I see that Simple Bitcoin Wallet is HD wallet so you need to save your seed somewhere safe.Nevertheless I would recommend you in case you have larger amount of
BTC that use some desktop wallet like Electrum or maybe hardware wallet.
Multibit is dead long time ago,I remember my Classic version and all problems have with that wallet.Switch to Electrum is solve that and make my life much easier.