How do i can save an project from an newer version to an older version of SOAP

aksekifdr: Soap Pro 4.5.2 is drastically older than the freeware version. While I do not see that it should not work, you may want to consider getting the latest version of Soap PRO, which is SoapUI NG Pro 2.4.0 and is bundled in Ready API. That being said, when you tried to open the project, did it not work? Did you get an error? Can you provide more details?