I'm installing Mathcad Prime 5.0, but the "Application Selection" Section is empty and i dont know why?
1.] what web page did you use to download installation package ?
2.] what file did you download ?
3.] in case that you downloaded zip file, did you unzip it ?
This very same problem came up here in the forum quite a couple of time but unfortunately so far nobody posted a solution or workaround.
You may consider to bring the problem to PTCs attention by contacting their support (good luck!).
"Mathcad Support Center": https://support.ptc.com/support/mathcad_supportCenter.htm