^^This^^

I think most software will not even let you start a return without paying.  I know you can convert an unpaid-for ProSeries file into Drake (for example).  So I'd try Lisa's approach of converting 2018 to your new software.  It's renewal season, so tell them if they don't give you 2018 for free, you're going back to ProSeries for 2020. 🙂

Rick