Install of 1.3 after removing with 2.x installed

I’m trying to reinstall 1.3 to make an automated uninstall, but with 2.03 installed (Then uninstalled), the 1.3 installer keeps saying a newer version is installed and will not continue.

Is there a way to fix this, a registry entry perhaps that controls the versioning? We have around 1100 users, and manually uninstalling 1.3 Revit + Core manually isn’t really an option.

I really don’t want to uninstall the 5 different versions of Revit I have installed just for this. (2016-2020).

If you uninstalled all versions of dynamo delete these keys in the registry, this is what the installer looks for:


If you want an automatic tool for this you can use Microsoft’s fix-it tool:

Then install 1.3, after that 2.x

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