file conversion .xmcd to .mcdx(Prime 3.1)

Hi, I recently changed the motherboard on my PC, and my Mathcad15 licence is no longer valid. Impossible to tranfer it to a new host ID, PTC does not recognise it. I have Mathcad prime 3.1 licence, working well, but the converter from .xmcd to mcdx does work without Mathcad 15 operating. I need only 6 files to be converted.

My question is if anybody having Mathcad 15 and Mathcad prime 3.1 installed could kindly do this conversion for me.

I join a ZIP with the files

Note that Prime 3.1 version is required, More recent versions might deliver .mcdx files not readable with 3.1 version. I’ve read that somewhere on this site

Thanks in advance