This question has been answered by frogabog. See the first response.

Did you try deleting the files in the core/cache folder, or are you relying on the cache-disabled setting alone?
Looks and sounds like compress_css and compress_js, but after setting those to 0 you do need to delete the files in core/cache to get the manager back. If that doesn't work, again clear the core/cache files and re-run setup with the cache cleared.
Hostgator always worked great with MODX, but it's been a couple years for me so things could have changed.