Still have syncing problem with my LTC wallet

I could use some assistance with my ltc wallet. I still have not been able to figure out what to do to get my wallet to fully resync. I can see my coins but the resyncing progress is stuck at about 84.83% completion. I’ve tried to delete the wallet and reload a new wallet but that hasn’t seemed to work. I made the mistake of trying to upgrade to the new version of the wallet after the deadline last year.
Thanks for any help.