Unsuccessful support for utilizing MathCad-15 and Prime which I purchased in 2018 I have been on the phone and on-line, starting yesterday and continuing today (many hours) trying to download MathCad-15 and Prime-4 that I ordered in 2018:Customer #: 600349Service Contract #: 7A2115399Sales Order #: 3501001Yesterday, based on this information I received 2 license files, one ending in "_standard.txt" which is for my new computer. I clicked on the attached website for downloading the software and your system didn't allow me to go to that site or any site in the e-mail with the license files. Yesterday, someone had me download the trial version of Prime; however, there was no means of how to utilize a license file. Which of my license files is used for MathCad-15 and which one is used with Prime-4 (which I had previously)? Today, someone gave me a link to download MathCad-15; however, after I downloaded the free version of MathCad-15, I was unable to read the "read me first" or the installation-help files (seemed to be a conflict between Google-Chrome (which I always ut