iplayboy, did you just click on server or use right click and click on "use as server"? Electrum will not connect to new server if you not uncheck “select server automatically”, and use option which I mentioned.

Problems with sync can also be because your antivirus / firewall is blocking Electrum, so check that if there is no luck with server changing. Did you use Electrum before 3.3.4, maybe some files get corrupted during update?