Error shown while launching word doc. with VTSO file

Hello,
I am trying to get a VSTO addin update for word without VSTO automatically launching and the end user rights doesn't have enough permission to install. I don't want to install it, just upgrade it as the first install will be completed with vsto installation from the VS publisher folder, which has admin rights. In order to update, I do the following:
Copy the following files from the publish directory to the appdata directory, where the addin is.
MyWordAddIn.dll
MyWordAddin.dll.manifest
My word doc is linked with my VTSO file and when I launch it, there is the following error:

How can I do it so there is no error, thank you in advance!
