4.5.1 connector is available at the aforementioned Google Drive link.
4.5.2-4.5.5 connectors have been updated to include the fix I wrote about at http://forum.x-cart.com/showpost.php?p=376554&postcount=20
. Connectors above 4.5.5 do not need the fix.
4.5.0 and 4.4.5 connectors are being tested now and going to be published soon. I'll post a message here as soon as we roll them out.