Hello @lyonhaart001,
I presume you have already bought your addon products from the marketplace on a separate account and installation of MSFS for inspection and performance checks, and are aware of the Warning About Encrypted Files and Their Usage in Marketplace Packages. If not, then I recommend you consider this.
On this separate installation of MSFS (with the marketplace version of your addon products installed), you should locate the folder of your addon products within the MSFS folder directory and add the new updated version files in the addon folder directory and then check the results after loading up MSFS.
You are only replacing files with an updated version from source. It should work correctly.
If not, then check for error messages in the debug/error/inspection console. Report here.
if successful, then check your partner agreement before giving your customers out an installation file to confirm you are not violating any conditions within that agreement.
Thank you for reading,
Emily