Which port on the CRS317 is your PC connected to?
If it is ether1, you should try the other ports, but since they are SFP’s, you will need a copper SFP, and it may well not work if you haven’t already configured it.
It is possible that by using the Quickset as “router” the ether1 has become a WAN port, and so the firewall and/or allowed interfaces for MAC-winbox prevent you from connecting to it.
There is a reason for Rule #4 (for next time 
):
http://forum.mikrotik.com/t/the-twelve-rules-of-mikrotik-club/182164/1
Since you have in practice no configuration or at least not a complex one, you’d better reset the device and start from fresh.