Changing drive letter really messed up Todoist Outlook
I rebuilt my machine today - a Lenovo X1 Carbon running Windows 8.1 and Office 2013 - and initially installed the Todoist plug-in for Outlook with no problems. I then changed the drive letter of the partition where I installed the plug-in, forgetting to have done this earlier in my rebuild process. Obviously this caused problems for the plug-in, so I reverted my drive letter change, uninstalled the plug-in from Programs and Features, updated the drive letter once again, and then reinstalled the plug-in. This process worked fine for other programs, but the Todoist plug-in stopped working.
After uninstalling again, I could see that the Todoist COM add-in in Outlook's settings was still registered and referred to the old drive letter. So I ran Outlook as an administrator and removed the add-in from that list. Reinstalling the plug-in did nothing to help get it working again. I decided to do one more uninstall and then a full-on manual deletion of anything *todoist* in both the registry and on my drives. Even after all of that, the behavior is now the same and I'm stuck: I can install the plug-in with no errors, but it doesn't actually load into Outlook and the COM add-in page doesn't show the plug-in.
I've hit my limit of understanding of how the plug-in is registered as an Outlook plug-in. Do your devs have any idea what else I can try here?