YAC Library won't launch

Have Windows 7. YACReader works fine but when I select library nothing happens. Already tried uninstall/reinstall.

Uninstall, then go to "C:\Users\YourUserNameHere\AppData\Local" and delete the whole "YACReader" folder. You may want to make a backup of the folder (copy the folder somewhere else).

You will lose all of your configurations but you can re-add the libraries you had before.