How to upload a 2nd TRIAL PTCMathcad Prime 9.0.0.0 TRIAL software on my laptop (1st PC upload is ok)

I'm travelling tomorow morning to Spain for 3 weeks and I might have a copy of my TRIAL PTCMathcad Prime 9.0.0.0 software on my laptop, to fully explore before the end of my 30 days! Apparently 2nd upload (same name & address) is not working. How do I have to proceed? Best regards. Dirk Vanwalle - dirk@vanwalle.be