blockexplorer is not fully synced I am working with a cryptocurrency which is a fork of bitcoin. In my blockexplorer it shows 91% synced and I cant see any latest blocks.
Does the GUI of the daemon show that you are connected to inbound peers?

If it does, you may have to do a re-sync of the blockchain from scratch. It's happened to me before. 

Not sure which crypto you're using, but I'd try backing up your wallet.dat files, you can save a copy of the blockchain database as well if it's huge and restore it later just in case. 

But back up your wallet files, then do a fresh install, re-sync the blockchain, and see if it gets to sync status. Then open your wallet files.