can't upgrade marketpress from Version 2.9.6.2 to Version 3.2.1

We have multiple sites that haven't been upgraded from marketpress v2.9.6.2 to v3.x

We now have a site that we have to and we're having issues with the pages.

All the pages are missing the name /store/ from the url
https://domain.com/products/
should be
https://domain.com/store/products/

I can send the development server info when needed.

Thanks in advance