How can I downgrade an SSIS project for use with VS 2017 standalone?

I inherited a project that was being built in VS 2019. After I finished building it and asked the requestor for clarification on how to handle a few scenarios I get a warning that the license for VS 2019 is about to expire. Turns out the project was running on the 30 trial license. The server is on a network that is isolated in such a way I can't use an MSDN account to sign in. We were able to get VS 2017 Standalone shell installed with data tools using the off line method. Now the problem is I have a 2019 project and dts package with 2017 tools. Is there a way to downgrade the project to 2017?