Hi Eros, and thank you for your comment!
If I understand correctly, you copied VICE to the directory "C:\Users\Eros\AppData\Roaming\UGBASIC-IDE\emulators": if so, simply close the IDE, rename that directory to something else (eg: "C:\Users\Eros\AppData\Roaming\UGBASIC-IDE\emulators2") and launch IDE again to solve the problem.
The error you are getting is because UGBASIC-IDE finds that file "locked", for some reason. This file contains (or should contain) the configuration of the emulators (the various paths and command line options), and the fact that it gives an "access denied" error means that the IDE is not able to overwrite it with the new settings. This could happen for two reasons: the file is locked by some other program or the file is a directory, and therefore it is not possible to write anything to it.
Let me know if it helps.
have a nice day!
Marco