I was the original author of this patch. Since I recently reinstalled the latest version of Armadillo Run, I updated the speed hack to work with version 1.0.5 too. A bit late, I know, but better late than never.
Simply run the patch and select your Armadillo Run.exe file. Run the patch again on the same file to undo the changes made. Of course, you can also first copy Armadillo Run.exe to e.g. Fast.exe and then patch that one, if you prefer to keep the original executable unmodified.