Hello,
I have been running a masternode on a linux VPS for a couple months. When i came to check on it, it seems as though it went out of sync.
 When i run "getblockcount" i am stuck on 173219. So i added more peers to the conf file and restarted. It is still stuck on the same block from about November so i haven't been receiving and rewards since then. Please can someone help me get the wallet in sync again PS. i got the peers from the working block explorer

How can i delete the old blockchain and redownload?

EDIT: i just downloaded the wallet for my windows machine and it cant synchronise either, do others have this problem too? jumps between 1 and 0 peer connections even after adding nodes to conf file