I've been staying on v4.x to keep the sync to dropbox. I don't want to used their hosted service. I don't want my master password to transit over the internet and its hash to be stored in a db, no matter how secure they are. Centralizing this makes it a target of attack. There is no way a hacker will try to get my credential unless he targets me personally, and there is little to no reason for this to happen. It does exactly what I need it to do. I don't need all the fancy other additional features. :(