Quote: "Have you tried running the Practice.exe executable from the File Manager?"
Yes, produces same results.
Quote: "Did you use the compile button after deleting the files and then the Run button (which, I discovered, broadcasts AND runs the app, not just runs on the local computer)?"
Yes a few times. Close agk, delete files mentioned. Open agk, compile, run.
This is a weird, and frustrating issue. I started another little test app, and it seems to work fine. I would really like to keep the source code under version control though.