I believe the MIDlet version number you are seeing, va the OTA install, is a red-herring and you actually have version 2.2 installed.
Scroll thru the icons of the various applications you have installed and you will see "Options" (a "monkey wrench" icon on the BB Dimensions Theme - icon varies from theme to theme). Once, you click on "Options" you should see "OntoCalender v2.2" where the various options for the app can be set.
Hope that helps...
Update : I see "rknobbe" posted whilst I was typing...