I did have 14.4 on there in the past before I downgraded my drivers to 3.12. Perhaps that has something to do with it? I used Graphic Uninstaller Utility to remove the old drivers but perhaps it left something behind like the file you are talking about?
I remember one trick but not sure if it will pertain to you or to yacminer but give it a try. This works with cgminer also. Uninstall the yacminer and re-install it. If you tried to run yacminer at any time while using the 14.4 drivers you will have problems. I think the first time the miner runs it creates some internal reference file based on the driver and uses that as a reference every time you start it again so if you ran it with 14.4 and then downgraded to 13.xx it is still using some reference file based on 14.4. Also if you mine x11 occasionaly you do not need to upgrade drivers for the x11mod if you use the LTCRabbit version. It works fine on 13.xx drivers and still gives increase hashrate but for me I have to reboot miners completely if I switch from x11 to yacminer or some gpu just go dead or wont start. reboot and everything awesome again.