Dutch S-89 issue

I am struggling with the importation of the new Dutch S-89 pdf.
The pdf was copied to the template folder. Then Theocbase tries to make a jpg of it but it is savef nowhere on the HD.
I tried to convert the pdf myself to jpg but then I gete in Theocbase the known message: “Box count for this template is incorrect …”
I a using Windows 11 en version 2024.02.0 of Theocbase.
I read a lot of explanations in the form concerning this problem, but I cannot find a easy proper answer tot the problem. I would like to know the real cause of this problem to understand it and look for a working solution.

It looks like the box definitions are merged with the old ones rather than replaced.