you are doing the same thing as you did last time I think

you are trying to instal the pro+ version of the program, downloaded from xara.com, which is not the version you bought

in the closed thread[s] the webmaster gave you the link to the magix service centre where you can log into your account and download the version that you paid for which should work with your S/N

here it is again: https://www.magix.com/gb/support/my-service-center/

this is for the GB/UK site, but you should be redirected to your local one automatically

Magix have ceased dealing with xara, bu this service centre remains in place for stiuations such as this

you get support direct from xara via chat, as mentioned before...