Keywords:
Remove, addin, ChemOffice for Excel, COM Addins, deselect
1. Open Excel, Go to File | More | Options
2. Then choose Add-ins on the left.
3. At the bottom beside "Manage", select "Com Add-ins" and click "Go"
4. Deselect "ChemDraw/Excel 21" for version 21.x. The name will change depending on your version of ChemDraw.