Want to try then buy VDL2026Plus on Win 10 pc before Microsoft's 14 October shut down date, after which I will not be using the pc online. So, time is short...

I tried on 5th Oct, using the Magix website, UK selected top right,   During the process of downloading Trial version of VDL 2026 Plus, I was asked to register, which I did. I was immediately sent an email with an Activation Serial Number.  The download seemed to go ok and said it was installed, with a program shortcut appearing on my Desktop.  When I click on that, a box appears with 3 options:

1. Activate with Serial Number - You will receive a serial number by email (which I have)
2. Purchase Online
3. Start Trial Version - Please register in order to activate your trial period

When I clicked on Activate with Serial Number, a second box appeared, and I put in the number, as instructed with no letters or dashes.  The dashes appeared by themselves, but not in the right places.  I then tried copying and pasting the entire serial number, complete with letters, but just the numbers appear, again with the dashes in the wrong places.
There is a P just outside the space in which I have to type the Serial Number, but the Serial Number sent to me started with "TRIALC". I think this could be the problem. 

The program will not open from desktop shortcut, the same boxes appear each time with the same 3 choices. 

I contacted Support as per website instructions and received a ticket number from a bot, with instructions to enter my serial number in the box, which ignored the details I gave to them.  I have replied to that, using the ticket number, and explaining again, but don't think I will receive help soon from overworked Magix Support team.

Any ideas?  You all seem so helpful on the forum - BTW,  I know my pc spec is under par for the software, but for my very basic editing needs I thought it might cope, worth a try. No HD files, just loads of Standard Def, 2 to 15 minute MOV garden clips from camera, joined, using takes mostly, very simple transitions, own music added, burned to 80 minute DVDs for friends and family. Also some  non-HD TS files from TV.  I used MEP 2013 on old Win 7 pc for years, still working, but that offline pc needs attention now. 

 I am extremely "tech unsavvy".  I may regretfully just have to uninstall the program and forget it. Good job I didn't actually purchase the download first.  Shame, used Magix for over 15 years on various pcs, used to be great.