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Luc
An end of sale should not mean that I am unable to use a perpetual license.
This user apparently got a new license for Prime 4
Migrate Prime 4 and MathCAD 15 to new computer
Have you read the FAQ too? https://www.mathcad.com/en/-/media/files/pdfs/mathcad/end-of-sale-mathcad-faq-en.pdf
There may be a difference between 'a perpetual license and active maintenance' <=> 'a perpetual license' (and no active maintenance).
But in any case, you should contact PTC support to find out if they can help you transfer the license to your new machine.
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Luc