Can I import OrCAD schematic files into free trial version of CircuitStudio?
Take a look at https://www.element14.com/community/message/243022/l/importing-orcad-into-circuitstudio#243022
But you can try to install the wizard according to https://www.altium.com/documentation/altium-designer/orcad-import-ad . It may work? Please let us know.