Regex using Notepad++ to add space before a capital letter

I have looked around and found good answers but none work with notepad++, most are for java and php. I have found the search strings below but obviously I'm a noob with regex as i don't know what open/close tags are proper in notepad++.

I would like to add a space before each capital letter.

Example:

StackOverflowKegger

becomes

Stack Overflow Kegger

This is what i have found.

Find: [a-z]+[A-Z]+ Replace: $1 (there is a space before the $)

Find:

(?<!^)((?<![:upper:])[:upper:]|[:upper:](?![:upper:]))

("(\\p{Ll})(\\p{Lu})","$1 $2")

(?!^)(?=[A-Z])

Any help would be appreciated.