I go to my server list to play multiplayer and every time EMC is labeled "communication error" and I'm kind of worried because if this keeps up my residence is going to get wiped. I am on 1.7.2, if that information may help.
update.emc.gs for a guide on reversing the update. Also if you don't want to you can still vote every so often to refresh your derelict status. EMC should be updated by a month anyways.
If you have the 1.72 launcher, downgrading is extremely easy. You can click the edit profile button, and choose from the drop down list in the middle of the page what version you'd like to play on. 1.64 and 1.62 are compatible.