I've installed the outlook app and for the first day Todoist was on the right side of my email screen and I liked it there - something happened and it's no longer there but I can't seem to get it back. Can you help?
You will find in the Outlook tool bar a tab for Add-ons. There is a box Todoist you have to check.
Please try to use the check box button as Richard said and if this won't help, go to Outlook's Options -> Add-ins, click on "Go" next to "COM Add-ins" (at the bottom) and check the box on this list to reactivate the plugin.