Glad folks are finding this useful!
I had wip folder with the game's cap and plugin saved screenshots into the cap's folder, but when I exported the game into different folder and run the exe, it saved the screen into the cap's folder. I had to export the exe into the same folder as cap file, than it works.
Thanks for the bug report. I'm not sure a good solution to this problem. It seems to work just fine for the executable you made, but you are correct that it does weird things between where the exe is saved and where the WIP folder is on the developer's machine.
If I set the current working directory to the directory of the current running executable then when you are using construct it will save to either scirra/contruct or a temp folder. But it would solve the problem I think. Another option is to specify the save path...but we don't know where folks will put their executable when they get it.
Does anybody have an idea on a good solution to this?
In the meantime, I'll take a look at making configurable sizes to save them to (or at the least a small, medium, large).