4.4.x versions of Hippotizer requires clean install

The 4.4.x version of Hippotizer has a lot of changes in it.

You should uninstall Hippotizer before installing any version of V4.4.x. 

Important Installation Notes

4.4 introduces significant changes; migrating existing shows from older software will require reprogramming.

Uninstall all previously installed Hippotizer versions before installing 4.4.
DMX Personalities have changed — pre-4.4 personalities will not work.
Component exports are not backwards compatible. Timeline, Presets, Macros and DMX from pre-4.4 cannot be imported to 4.4.

Please check out the release notes and manual here.

Both of these can be found from the HippoLaunch screen on your Hippo here:

If you are already running V4.4.0 please update to the latest version of V4 found here along with the Utilities, MA2 Personalities, FlexRes Tools, Manual, and Drivers.