I just learned an important fact. You must Install Rules after editing a file for the changes to take effect. Otherwise, the file you Save will not include the changes. Why is this important? I created a system of two scripts, both using a common include file. So I didn't bother to Install Rules after changing the include; it'll be compiled with the using script, won't it? But no, Install Rules is essential before Saving the updated file. The same is true for a plain script, of course.
This should be highlighted in the StreamByter manual, near the beginning, where editing and Install Rules are described.
And it would be extremely helpful if both Save and Load could alert when a changed edit buffer has not been processed by Install Rules. This would save newbs a lot of confusion.