Do you mean with the recent service pack to ENVI 5.2? Or perhaps the hotfix for that, which became available recently? I don't see any record of changes in the Change Detection tools in either of those releases. One exception is a fix for an issue that occurred only if you run the image difference change detection with preview enabled, and check the 'Radiometric Normalization' box. The change is only to prevent the error message that pops up here in ENVI 5.1 and 5.2 before the service pack. I am afraid that I do not understand your question about refreshing steps. If you would like to reword it, I'll be happy to try to answer. - Peg Exelis VIS

Although it is not clear which Change detection tool you are using (the Workflows?), I don't believe there have been changes to the Change Detection tools in the most recent version (ENVI 5.2 SP1). The workflows do allow you to 'preview' your settings before moving forward and it also allows you to move back. Is there a specific behavior in the tools that you are having trouble with?