go to the command line and type:
1. "devel-su"
2. type in the root password (should be known, otherwise search forum)
3. "dpkg -P wazapp" -> this will purge the wazapp package from your N9, in other words...deinstall...if you have it installed from a .deb file. When you installed every file manually, but I'm sure you did not then this will not work.
4. now you should have a device without wazapp installed
5. check if the .db (located in ~/.wazapp) was removed too (I'm not sure on this point)
SO BE AWARE, THIS WILL REMOVE WAZAPP FROM YOUR PHONE