Logicim XLGL is missing from the ribbon/menu in Excel or the button are unresponsive. What can I do?

Try the following:

1. Save your work and close all Excel windows.
2. Click on the windows start menu button.
3. Navigate down to the Logicim XLGL group and open it.
4. Click on register Logicim XLGL in Excel.

If this does not solve the problem, you may have to remove the XLGL add-ins from the disabled items list in Excel:

1. Open Excel.
2. Click on Options.
3. Click on Add-ins.
4. Select Disabled Items from the manage dropdown box at the bottom of the window.
5. Click Go...
6. Select the XLGL add-in(s) from the list and click on enable.
7. Click close.
8. Click ok in the options window.
9. Close Excel.
10. Click on the windows start menu button.
11. Navigate down to the Logicim XLGL group and open it.
12. Click on register in Excel.