HTC Sync Manager says update needed even though I'm on the lastest version.

I finally unlocked my bootloader and immediately ran into problems. I went to restore my phone to one of sync managers backups but when I connect my phone to my pc, I get a popup within sync manager saying "update needed, This device needs to connect with the latest version of HTC Sync Manager. Please check for update or download". Weird thing is that I'm on the lastest version, version 3.1.54.2. I just can't get sync to work. Can someone please give me a solution?

Phone Stats:
One M8 (At&t) 5.0.2
Unlocked bootloader
32GB