The VT addins require the 32-bit version of Microsoft Office/365. If you are using the 64-bit version, follow the steps below to install the 32-bit version.
Please note the following:
•32-bit Excel Office/365 can be installed on Windows PCs except for certain ARM-based PCs.
•Unfortunately VT Software cannot provide technical support on reinstalling Microsoft Office as it is a third-party product. You can reinstall Office by following the instructions below. If you encounter any issue when reinstalling Office, please contact Microsoft support.
1. Uninstall 64-bit Office
Note: Before uninstalling Office, please ensure that you have a valid license for Microsoft Office in order to reinstall it:
a)On your PC, right-click on the Windows icon:

then select Settings > Apps > Installed Apps (called Apps & Features on Windows 10)
b)Click on the Microsoft Office/365 application from the list of apps and select Uninstall:

c)If you have any other installations of Office/365 on your PC (including foreign language versions) and/or standalone versions of Office programs (e.g. Word, OneNote, Access), uninstall them in the same way.
2. Install 32-bit Office
1.Go to https://portal.office.com/account#installs and sign in with the Microsoft account associated with your 365 subscription. 2.In the Apps and devices screen, select 32-bit from the Version drop-down and then click on Install Office: 
This will download the 32-bit Office installation file to the Downloads folder on your PC. Go to your downloads folder and click on this file to install the program.
Note: If when reinstalling, you get the following error message, this means you have not completely uninstalled the 64-bit version. Repeat the Uninstall Office step above for any other versions of Office/365 (including foreign language versions). On some occasions, this error has also come up when a user has Microsoft OneNote installed as a standalone program, in which case all versions of OneNote should also be uninstalled.

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1.Go to https://account.microsoft.com/services and sign in with the Microsoft account associated with your 365 subscription. 2.Click on Install apps (If you cannot see Install apps, click on the Home button: 
3.You should then see the following pop-up; select Microsoft 365 - 32-bit from Choose a version, and click on Install: 
The installation file for 32-bit Microsoft 365 will be downloaded to the Downloads folder on your PC. Go to your downloads folder and click on this file to install the program.
Note: If when reinstalling, you get the following error message, this means you have not completely uninstalled the 64-bit version. Repeat the Uninstall Office step above for any other versions of Office/365 (including foreign language versions). On some occasions, this error has also come up when a user has Microsoft OneNote installed as a standalone program, in which case all versions of OneNote should also be uninstalled.

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1.Go to account.microsoft.com/services and sign in with the Microsoft account associated with your Office product. 2.Scroll down the page to Products you've purchased, and click on Install 
3.You should then see the following pop-up, select Office - 32-bit from Choose a version, and click on Install: 
This will download the 32-bit Office installation file to the Downloads folder on your PC. Go to your downloads folder and click on this file to install the program.
Note: If when reinstalling, you get the following error message, this means you have not fully uninstalled the 64-bit version. Repeat the Uninstall Office step above for any other versions of Office (including foreign language versions). On some occasions, this error has also come up when a user has Microsoft OneNote installed as a standalone program, in which case all versions of OneNote should also be uninstalled.

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