Import Overwrite Question

[BeZurKur]

I'm very shaky on the import feature. I have a realm ruleset for the game I'm running at the moment: ACKs. I'm trying to "do it right" with proper links and all, but it's taking a while (and monsters are a chore). So here's my question:

If I were to import what I have done into my campaign realm, can I continue work on the ruleset and repeatedly import my growing ruleset realm -- overwriting what was there before -- into my in-progress campaign realm?