ProSeries can be converted. https://proconnect.intuit.com/tax-online/data-conversion/

ProConnect Tax is based on Lacerte, so the look and feel are totally different from ProSeries. You can click the Orange "Try it free" on the right side of https://proconnect.intuit.com/tax-online/ and sign in with your current user name and password. Create a return and do everything except print or efile for free. 

You do need an EFIN to use ProConnect. 

You may find something of interest here -  https://fitsmallbusiness.com/best-tax-software-for-tax-preparers/