Dave,
There are two major versions of RSView32, RSView32 Runtime, and RSView32 Works. The Works version is needed to make editing changes in the program. It is a seperate, more expensive license, although Works includes a "Run' version, so that you can both edit and run. If your change is minor and uncomplicated, it would probably be cheaper to E-mail your program to someone who has a copy of Works and would do the change for a small fee.