Exporting a registry search (xp)

Let us suppose i want to extract in a file all of the registry all keys pertinent to some software, i could, e.g., type “comodo” as a search word.

Regedit does not do the job, as it only shows successive found keys.
As illustrated in these same forums, some softwares, e.g. Registrar Lite
actually show the list, but fail to export it (unless i did myself) to, say, a text, reg, or html file.

Maybe a dos FIND syntax could also do the job, but i don’t remember the appropriate syntax.

Thanks for your advice.