sed -n '/PlacemarkStart/,/PlacemarkEnd/p' file

Alas, it seems that ESET Smart Security locks up my Windows every couple of days. Going to try switching to Norton.

Yes you can export your Slickrun commands and import them into Executor. BUT you need to modify your Slickrun export to look like Executor export format. They're not that different, but they are definitely different. Someone should write a program or script or website to make this conversion easier.

How to count occurrences in jEdit

To count the occurrences of a string "foo" in jEdit, simply do a string replacement, e.g., replace "foo" with "bar". The status bar will show the number of occurrences.