Update:This has been happening all day. I noticed a couple things that might help identify what's going wrong here. When I hit the button to enter the screen where you specify the path for the mining software, it appears that the correct location is selected in the box already, but when I hit the button to navigate to the software, it starts me out at the location of the last software that couldn't be found. For example, if excavator won't start and I help it find the excavator file, then an hour later it may try to switch to nevermore, and it can't find it. I go to help it out, and it shows the correct nevermore path in the box, but when I go to specify the path, it starts me in the excavator folder, I correct it, then an hour later the cpu miner (on a seperate profile btw) can't find the Cryptonote cpu miner, and I go to show it the location and it starts me out in the Nevermore folder, etc. Hopefully this helps. Thank you.
When Awesome Miner says that the file wasn't found in the Diagnostics wasn't found, it also lists the exact path and filename it tried to use. If you copy this path and run it, it should be a good indication if any part of the path or the file itself is missing.
The fact that the file browsing dialog is showing another path when you browse is just a UI issue where Awesome Miner doesn't explicitly tell the Windows file dialog to automatically browse to the folder you have specified. Instead the file dialog shows the folder where you where browsing the last time. This doesn't have any impact on the actual path configuration, but I will see if I can improve this UI behavior.