With regards to the recent problems with the UI, I'm not sure why it's happening as I'm not involved with it's development.
I uninstalled the UI via the Control Panel / Programs and Features, downloaded the latest version, installed and it's working fine.
Step-by-step:
1. Exit Elite
2. Save/Export whatever theme you're working on (save outside the Elite game folder)
3. Go to Control Panel / Programs and Features. Click EDHM UI then the Uninstall button
4. Download the latest version of
EDHM_UI_Setup.msi
5. Run EDHM_UI_Setup.msi
6. EDHM UI should be working now