Install

ModelxcelPro ships as a Windows bootstrapper that installs its prerequisites and then the add-in itself. Here’s what it sets up, the rights it needs, and the steps.

Beta: the installer is not code-signed yet

During the private beta the installer is not yet Authenticode code-signed, so Windows SmartScreen may show an “unknown publisher” warning. To continue, choose More info → Run anyway. A signed build ships before general availability.

Prerequisites

The bootstrapper (ModelxcelPro.exe) installs these automatically if they are missing:

  • .NET Framework. The add-in’s assemblies target .NET Framework 4.8.1; the bootstrapper currently chains the .NET Framework 4.8 redistributable (per the installer source), already present on Windows 10 1903+ and Windows 11.
  • VSTO 2010 runtime. The Visual Studio 2010 Tools for Office Runtime. Without it the add-in installs but will not load in Excel.

Admin rights

ModelxcelPro itself installs per-user and does not require administrator rights. However, the prerequisites (.NET Framework and the VSTO runtime) are machine-wide, so the first-time bootstrapper may request elevation (a UAC prompt) to install them if they are not already present. On a machine that already has both, no elevation is needed.

Install steps

  1. Run ModelxcelPro.exe (the bootstrapper). Approve the SmartScreen prompt if shown (see the beta note above).
  2. It checks for .NET Framework and the VSTO runtime and installs whichever is missing — approve the elevation prompt if it appears.
  3. If Excel is open, close it when prompted so the add-in can register.
  4. The add-in installs per-user to %LocalAppData%\Programs\Modelxcel\ModelxcelPro\.
  5. Open Excel — the ModelXcel Pro tab appears on the ribbon. Next, activate your license.

Updating and uninstalling

Newer versions install over the existing one. To remove ModelxcelPro, use Settings → Apps (Add/Remove Programs); the entry offers Uninstall. Removing the add-in does not remove the shared .NET or VSTO runtime.

Caveats

  • There is no public installer download during the beta — it arrives with your invitation.
  • Windows only; Excel for Mac is not supported.

Troubleshooting

The ModelXcel Pro tab doesn’t appear: the VSTO runtime is likely missing or the add-in was disabled in Excel’s File → Options → Add-ins → COM Add-ins. Re-run the bootstrapper to install the runtime, then reopen Excel. SmartScreen blocks the installer: expected during beta — choose More info → Run anyway.