Backup your wallet.
Then try to remove all the files/directories except /wallets/ and /chains/ under .BitSharesx/.
Then launch the client again.
I checked my delegate after out of work just now, the situation became much worse , only 3 connections , I missed so many block .
but luckly , I deleted all files/directories as you said ,and restart again ,I have close 20 connections. it is OK now
I don`t konw if there is some bug ?