The oldest version of the Java ChibiPaint Oekaki painting tool (v1) has now been removed, so the two available options are now ChibiPaint v2.0 (Java) and ChickenPaint (JavaScript).
All web browsers that still support Java (fewer every month) should be able to use the v2 version of ChibiPaint, or switch to our newer ChickenPaint editing tool.
You can edit your Oekaki painting tool settings on this page:
http://www.chickensmoothie.com/oekaki/settings.php