Linux users can compile from the repository source code on GitHub. The download link below will take you to the SimpleIDE GitHub repository.
If you try it and find something you think might be a bug, please report it to the SimpleIDE Open Source Project [3] site's Issues [4] page.
3-position Switch
If your board has a 3-position switch, you can set it to 1 or 2. 1 will power the microcontroller and the sockets alongside the white breadboard. 2 will also power the 3-pin headers above the breadboard.
Links
[1] https://github.com/parallaxinc/SimpleIDE
[2] http://www.ftdichip.com/Drivers/VCP.htm
[3] https://code.google.com/p/propside/
[4] https://code.google.com/p/propside/issues/list
[5] https://learn.parallax.com/node/658