When attempting to install or update the Nintex products, the .exe file fails once the installation has started.
- Run the Nintex Workflow installer.
- When you get to "Do you want to add the solution to SharePoint now?" select "No, I wish to export the solution and deploy it manually later."
- Save the exported files in a folder of your choice.
- Open that folder and navigate to the "Workflow" folder.
- Run the Install.ps1 PowerShell script as an administrator.
- This will run the installation process outside of the .exe file and will update/install the new version of Nintex.