Ok. Which wookie build did you choose? Certainly if you didn't try it, try wookie lite as that has a smaller footprint.
The mxqpro boxes have less ram than other boxes so need to keep a closer eye on memory.
Have you downloaded many apps from google play for example? May need some weeding.
If things continue badly, delete wookie.(on both versions of kodi via apps - dbmc/kodi - clear data).
Then load a few addons manually.
To do this set up the fusion source in kodi file manager (the fact that you can load wookie suggests you have been able to open an empty kodi instance satisfactorily).
Once set up go to install from zip and install the addon installer from fusion (click on start here).
After installation go to programs and open the addon installer.
Install a handful of stable addons like phoenix, evolve, vidtime, castaway and sports devil.
See how that goes and report back.
To be honest you are unlikely to need more than 12-15 addons anyway which you can install manually.
Make a note of the ones you really need/use and use the seo-michael web site as an installation guide.
Report back on progress or if anything is unclear.