In some rare cases when an error occurs during the usage of JChem for Excel or JChem for Office, the add-ins may become disabled and have to be re-enabled manually again.
Open Excel, Word, PowerPoint, or Outlook, and click File > Options.
Navigate to the Add-ins tab.
Chose COM Add-ins from the Manage drop-down list and click Go .
To load a COM Add-in, tick the checkbox next to the add-in that you want to load, and click OK. The following add-ins are available:
JChem For Word
JChem For PowerPoint
JChem For Outlook
If the add-in that you want to use is not listed in the Add-ins available box, then click Add and locate the add-in.
To unload a COM Add-in, do one of the following:
In the Add-ins available box, clear the checkbox next to the add-in that you want to unload, and then click OK.
Note This unloads the add-in from memory but keeps its name in the list of available add-ins. It does not delete the add-in from your computer.
To remove a COM Add-in from the list of available add-ins and to delete the add-in from your computer, click its name in the Add-ins available box, and then click Remove.