Finding and replacing range of numbers

Hello,
I have a really long set of numbers. All are in range 0-100 and mostly they are exactly 0 or 100. How can I specify to PSPad, that I want to find values within the range let’s say 40-60 and replace them with other value?

And is it possible somehow specify, that numbers in range 40-60 I do not want to replace with exact number, but I want to add to every number in this range a specified value. (example: pspad finds number 51, add 10 to it and write instead 51->61)

Thank you.

Hello
It isnt possible by search/replace
You can use user converter what supports regular expressions,
create list of replacements and fire it at once on your file