Need help renaming Chapter numbers for multiple files

[Dawnb88]

The program that I use downloads the files as "Episode 001.CBZ" and so on. And it will also name some of the files other things like "Season 1 Finale" and so on. I would like to be able to rename these quickly by finding out if its possible to rename the order number.

I want to go from this:
001
002
003 to something like this:
1
2
3 this is what I want without the zeros before the numbers. I don't know how to change it in the program yet so since I have so many files already downloaded I figured I would use a free file renamer program to start out and then ask on reddit how to change the file names before downloading the next batch of files. I hope this makes sense. Thank You in advance.

[Luuk]

With RegEx(1) having a checkmark for "v2", the "Match" can be like...
(?<!\d)0+(?=[1-9])/g