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Installation Instructions



1. Download the installer

Download the installer named Macabacus20XX.exe from the downloads page. Verify that the version downloaded corresponds to the version of Office installed on your computer.

2. Run the installer

For the most part, Macabacus installs just like any other Windows software. Be sure that you are logged into Windows as the end user, not an administrator. Request IT support if you do not have the necessary privileges to install Macabacus on your computer.

Over-the-Shoulder Installations

If an administrator performs an "over-the-shoulder" installation for you, you may need to log out of Windows and log back in for the installation to finish.


The installer prompts you to download and install the following Microsoft components (prerequisites) required by Macabacus if missing on your computer. If the installer cannot download or install a prerequisite for any reason, download the prerequisite directly from Microsoft using the the applicable link below and install it before attempting to reinstall Macabacus.

Microsoft .NET Framework 4.5 (this is the minimum version required; you may wish to install a later version)
Microsoft Visual Studio 2010 Tools for Office Runtime

Citrix / Terminal Server Environments

When you install Macabacus, the registry keys that instruct Office applications to load Macabacus add-ins upon start-up are created under your HKEY_CURRENT_USER hive at:


If you log out of the Citrix "box" and then log in as another user, Macabacus should still be installed. However, the necessary registry keys will likely be missing from that user's HKEY_CURRENT_USER hive, and Macabacus add-ins will not load for that user. Therefore, when deploying Macabacus in a terminal server environment, ensure that Macabacus is installed in the logon script, or otherwise ensure that the necessary registry keys are present in the user's HKEY_CURRENT_USER hive.

3. Activate or evaluate

If you have not previously used Macabacus, Macabacus will prompt you for an email address upon starting Excel, PowerPoint, or Word. Enter either (a) the email address of an authorized user to activate Macabacus, if you have already purchased a subscription, or (b) the email address you expect to use for managing your Macabacus subscription if you later decide to purchase Macabacus, to initiate your free trial.

You can activate Macabacus at any time using these instructions. If you are a corporate user and your email address is not recognized when you try to activate, ask your Macabacus account administrator to configure your access.


Uninstall Macabacus via Windows' Control Panel just as you would any other Windows software. To support updating your Macabacus software without losing your settings, uninstalling does not remove the folder C:\Users\%USER NAME%\AppData\Roaming\Macabacus and certain registry entries (e.g., HKEY_CURRENT_USER\Software\Macabacus). Remove these items manually, if desired.

After uninstalling Macabacus, you may receive a message upon starting Excel that Macabacus.xlam could not be found. This is because Excel remembers that Macabacus.xlam was loaded when Excel was last open, and now Excel cannot find it. To resolve this, open Excel's Add-Ins dialog and select the "Macabacus" list item. When prompted to remove Macabacus, click Yes. You should no longer receive this message after restarting Excel.

Extract MSI file from EXE installer

If you require the .msi file packaged in the .exe installer, perhaps for silent installs, follow these instructions:

  1. Run the .exe installer.
  2. When the installer dialog appears, do not click anything in this dialog and do not close it.
  3. In Windows Explorer, type %temp% in the address bar and hit Enter.
  4. Sort files in the Temp folder by the modification date. The newest folder there is named in the format {XXXXXXXX-XXXX-XXXX-XXXX-...} and contains the Macabacus 20XX.msi file you are looking for.
  5. Copy the .msi file to a safe location before closing the installer dialog.
  6. Click the Cancel button in the installer dialog. The .msi will be immediately deleted from the Temp folder.

There are also other methods to extract the .msi, including third party software and Windows' command line prompt.

Macabacus Lite


Macabacus Lite is a VBA add-in, so no actual installation—in the traditional sense—is required. Therefore, Macabacus Lite can be "installed" even where corporate IT protocols restrict software installation.

1. Download the add-in

Complete this form to receive an email with the Macabacus Lite download links. The downloaded file will be named MacabacusLite.xlam. If you do not receive the email within a few minutes, check your spam filter and firewall settings. If you are still unable to receive email sent from, use another email address.

Do not open the add-in

If your browser gives you the choice to open or save the downloaded add-in, choose to save it.

2. Move the add-in

Excel Add-Ins dialog

Move the downloaded add-in to following recommended folder:

C:\Users\%USER NAME%\AppData\Roaming\Microsoft\AddIns

The exact path may differ on your computer. Replace %USER NAME% with your own, of course. If the AppData folder is hidden, follow these instructions to display it.

3. Unblock the add-in

Since a July 2016 Office security update, you must "unblock" VBA add-ins. To unblock Macabacus Lite, right-click MacabacusLite.xlam in Windows Explorer, click Properties in the context menu, and click the Unblock button. If you do not unblock Macabacus Lite, it may not load automatically when starting Excel.

4. Load the add-in

Load Macabacus Lite from Excel's Add-ins dialog (Alt>T>I) shown to the right. If Macabacus Lite is not listed, click the Browse button to find MacabacusLite.xlam on your computer. If Macabacus Lite was previously installed, Excel may prompt you to replace the add-in—click Yes. Finally, check the box next to Macabacus Lite and click the OK button.


Uncheck the Macabacus Lite box in Excel's Add-ins dialog (if applicable) and remove the add-in from the XLSTART folder (or whereever it resides). See these Microsoft instructions if more detail is required.

This documentation refers to Macabacus version 8.9.14. Some features and descriptions of these features may not
apply to older versions of Macabacus. Update your Macabacus software to take advantage of the latest features.