You are fine. It is either resyncing or reindexing. If you deleted the data directory at any time when you upgraded it, then you will need to do a full resync. If bitcoin core was open when the computer crashed, the databases could have gotten corrupted which would prompt a reindex of the database. Just wait for the bar to disappear, which can take a few hours to a few days depending on your computer. In that time, the bitcoin should show up. If you find that it is done syncing (green check mark in the corner and the green bar disappears) and that your balance is still incorrect, then your wallet is messed up.
BTW, you should have upgraded to the latest version 0.11.1.
+1
So long as your new core client is pulling up the same bitcoin addresses that your previous version contained you should be seeing your balance once the blockchain resync catches up to the actual transactions you've made to and from the old address.