ok, new version up without the code to check for another running copy -
tenseiken would you mind testing this version and see if it helps?

(no need for jeffk test on this one).

thanks tenseiken, that's good news.
i'll work now on some new features.

yes, ive added a ton of features already; will be uploading a new version shortly.

reorganized options.
some cool effects which can be used to highlight the active window in a screenshot (my fav new feature).
cursor capture options; better support for multimon capturing
better save and autoname options.

other things planned:
ability to specify more external tools to invoke.
save comments in png images.
auto detection of active window/exe name for use in file naming.

other ideas are welcome - keep in mind the approach ive taken is to be very minimal on image editing, with the expectation that you will do this in an external editor (which the program should make as easy as possible to invoke), and focused more on facilitating fast and easy capture of lots of images one after the other.

Still works fine for me.  The new options panel is great, and I like the dimming and greying options.

v1.01.05 - you can now add as many custom external tools as you want to the Tools menu.