Firstly, there’s some info on the Support FAQ @ Support FAQ - Please Read THIS before Posting a Question - #3
While you can still use Orbiter to create new addresses and backup seed/keys, etc. if you created a wallet in January, it never would’ve shown you an actual balance (except empty).
It isn’t possible for the new pending wallet to interfere with Orbiter working. Wallets are only blockchain interfaces.
Perhaps your wallet file got corrupted, which caused it to not recognise the password. Easiest fix is to simply restore it from seed/keys.
Btw… if on Windows, did you whitelist it with your antivirus software/s and set it to Run in Administrator mode?