Hi @Dan Hartford ,
According to my research, the exported rules file (rwz) will work just fine when you use it with the pst-file that you exported it from. It will not work when you import it in into a newly created pst-file since the folder identifiers would be different or the folder could not exist at all.
It is recommended that you back up the original pst file and copy it to the same location on another computer.
After importing your rules, you might need to relink all the "move to folder" rules to the correct folder again, even though they might seem still correct. To do this, select the rule and then click on the blue folder link. This will open a folder dialog where you can select the correct folder for the rule to move the messages to.
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