I installed todoist plugin in outlook 2007, and it work fine at first. but when i restart， the todoist window disappeared. how can i get it back?
please go to Outlook's Options -> Add-ins (in Outlook 2007, this might be located in the Trust Center) and if you see a list of your add-ins with a "COM Add-ins" drop-down menu at the bottom, click on the "Go" button next to it. You'll access a list with check boxes next to each add-in. Please check the box next to "OutlookTodoist" and save the changes.
This should re-activate the plugin. We are aware of an issue causing the plugin to deactivate itself and will address it in the next revisions of our plugin. Sorry for the inconvenience.