Launching with Java 7 in jbdevstudio.ini results in module errors in subsequent launches with Java 8

When I launch JBDS with the -vm parameter in jbdevstudio.ini set to Java 7 and then try to launch it again with Java 8, I get a warning that a number of modules failed to load.
The stated reason is they cannot be loaded with Java 8 because they require Java 8.