Unable to re-enable a Word 2010 addin

Question

I'm building an Addin via VSTO for Word 2010.  I got an error message indicating that my addin had a serious error and if I'd like to disable it. Errantly, I clicked "Yes".  Now, I cannot re-enable it no matter what I do.
Here are all the things I've done:
File->Options->Add-Ins
From here, I can see my Add-in in the "Disabled Application Add-ins" section. I click the Add-in then below, the DDLB shows "COM Add-ins". I click "Go"
In the Popup titled "COM Add-Ins", I see my add in in the list, with the checkbox unchecked. I check the checkbox and click "OK".
Close word. Re-open word. Addin is still disabled.
If I don't close word and go right back in to the "COM Add-Ins" popup, it also shows that it's not enabled.
I've tried going through the registry and removing all references to the Add-in. I've tried doing a solution clean. I've tried deleting my normal.dotm files.
In all instances, the Word Addin disappears from the Add-Ins list. However, as soon as I rebuild my solution and run, the addin comes back (as expected), but it's still Disabled.
The addin itself isn't throwing any sort of exception to cause it to be soft-disabled. It's just not loading up. I must be missing something somewhere.
Any ideas? This is driving me crazy. I've spent hours on it.

Answer 1

Hi，
Do you have Add-Ins tab enabled?
If no, open word 2010 > ‘File’ > ‘Options’ > ‘Customize Ribbon’ > check the check box for ‘Add-ins’ under
‘Main Tabs’ and click ‘Ok’.
Try this:
1. In Word 2010
2. Click on 'Help', at the bottom of the menu click on 'About Microsoft Office Word'.
3. Then click on the Disabled Items button.
4. Select the Disabled Item and re-enable.
Hope this helps
Sincerely
Harry