Microsoft To-Do for Mac not opening, crashing immediately

Had the same problem (macOS 11.7.10, MacBook Pro Retina, 13-inch, Late 2013). If you have a time machine backup just copy back the To Do version 2.110, this version works without problems. You can keep a copy of this version somewhere on your mac and if an update from the App Store is not working, just copy it back to the applications folder, worked for me since the updates after 2.110.