Detect the bit version of Microsoft Office (32-bit or 64-bit)
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Start Excel and open a blank workbook.
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Click the File tab in the top left corner and select Account from the menu on the left.
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Click About Excel in the Product Information section:
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When the dialog box opens, you'll see the full version number and bit version (32- or 64-bit) of your Office at the top:

Keep in mind your bit version, it is necessary to know it when you load the add-in manually.
Manually load the add-in in Excel
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Click File in the ribbon again and go to Options.
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Choose Add-ins on the left side of the Excel Options dialog window:
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Open the Manage drop-down list, select COM Add-ins, and click Go:
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If the Ablebits add-in is not listed in the COM Add-ins dialog box, click the Add button on the right side:
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Browse to the add-in's installation folder. These are two possible paths:
- C:\Users\[USER_NAME]\AppData\Local\Ablebits\Ultimate Suite for Microsoft Excel\
- C:\Program Files (x86)\Ablebits\Ultimate Suite for Microsoft Excel\
Note. If you can't find the installation folder, it might be hidden. To make it visible, go to File Explorer and check the
Hidden items box on the
View tab:
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Find and select:
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adxloader.dll for 32-bit Excel
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adxloader64.dll if you run 64-bit Excel

Click Open.
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The Ablebits add-in has been added to the COM Add-ins list. Click OK:

Now the add-in should appear in the ribbon:
Related issues
No Ablebits tabs in the Excel ribbon
Ablebits tabs are present but not clickable
Ultimate Suite for Excel doesn't show up in Office 365 installed from Microsoft Store
See also
Ultimate Suite troubleshooting