Not Sure What happened
I had the todoist installed on Outlook 2010 and have used it for months with no problem. Today I x it out by mistake and it disappeared from my outlook screen. Now I can not get it to come back up. I have removed it from my programs and re-installed, I have tried most things recommended in your list of answers to problems to no avail.
Help would be appreciated.
The quickest way to bring the plugin pane back is to go to the Add-Ins tab in Outlook and click on the "Todoist" link (not "add to Todoist").
If this won't work, please tell me - have you tried to check the box next to "OutlookTodoist" in Options -> Add-Ins -> Go (next to "COM Add-ins")? Also, did you uninstall it through the Control Panel -> Add/Remove Programs?