I'm doing a play through of Arena and messed around with the controls but now I would like to reset them. I clicked on the reset keymapper file in the DoSBox Folder but they didn't reset. Am I doing something wrong? Any help would be appreciated.

Did you change them in the game or in DOSBox?

Poke around in the install directory and look at the cfg or ini files, perhaps the key maps are in there and not in DOSBox

I pressed control+F1 while in the game to bring up the DoSBox control menu.

Alright, I messed around with the cfg files to no effect. I managed to get they keys back to their defaults by using the DoSBox virtual keyboard, and manually switching the keys back to the original control scheme from memory. It would still be nice to know exactly how to use the keymapper reset for future use though.