Thanks for a quick reply and sorry for the delay (I was having problems with my PC...)
I just had some (Calibre) extracted view with several thousands of transistors (and a lot of parasitic elements, of course), and I wanted to remove a user-defined parameter from the transistors of a certain type. I wanted to search for the appropriate transistor master name, select all found instances and remove the parameter using Preperty Editor assistant.
Neverthless, I have already solved this by including sub-block names into the seach, which limited the number of matches to less than 1000 for each search. I had previously found that Property Editor's limit is configurable using oiMaxSelections variable, and wondered whether the Seach assistant's limit is configurable too.