First thing you should realize is: this is a Database thing, not an APEX thing.
For your question, I'm going to guess 'yes'. DROP APEX_040200 CASCADE;
I'd also hunt down the uninstall script for the default version and run that.
BTW - 99% of the time, the 'correct way' to move a database from one server to another is to use your Backups.
And exp/imp files ARE NOT backups.
Using your backups does two things:
makes it easier on you because you'll never run into this kind of conflict.
proves that your backups and recovery process works.