One of the most annoying things about Roaster is the following bug: if you leave the Roaster Runner in the background and return to the Roaster IDE, and then edit your program and run it again, it pretends to recompile the program, but then IT RUNS THE OLD VERSION AGAIN!!! If you are trying to debug a program, this can be really mystifying and frustrating. Therefore, you should get in the habit of quitting the Roaster Runner every time you run a program.
IMPORTANT: Closing the I/O window by clicking the close box does not quit the Roaster Runner!