Opening project in older version of Mendix?

Hi,

I created a project in version 6.8.1, but it turns out I will need to open the project in version 5.19 in order to deploy the application from our company server.

I've tried doing this a few ways, exporting the newer version package, simply opening in the older version, and I'm getting an error saying it can't be opened since it was created in 6.8.1.

Any way around this so I can open in the older version?

Thanks!