Starting with 2.2.5, Awasu now stores your data files in the standard locations. This means that if you have two installations of Awasu and you have data files in the standard locations, both Awasu's will find these data files and try to use them. This will cause major problems if the two Awasu's are of different versions!
To avoid this, you should run one or both of your Awasu installations in portable mode. This was designed to allow Awasu to run from a removable drive by forcing your data files to be stored beneath the Awasu installation directory (i.e. on the removable drive) but also fixes this problem since running in portable mode stops Awasu from checking for data files in the standard locations.
To turn on portable mode, simply create a file called .PORTABLE in the Awasu installation directory.
If you are using XP or Vista's Fast User Switching, this problem with some features not working also applies but will be fixed in an upcoming release.