I've been having the same Windows wallet problems for weeks. Will simply not sync even though there are 4-5 connections.

Attempted to sync from scratch with v2.1.2.0 with a new default wallet and I couldn't get past block 265476. Testing v2.1.5.0 now to see if it syncs completely.  It's been moving well but I noticed the Masternodes tab is not currently showing anything.

The wallet at C-CEX appears to be stuck (over 2 days and states "out of sync").

Have a lot invested and appreciate the dedication by CryptoVote and MCDev to BTX.