reset spamassassin: delete some files & have them recreate?

This is safe

It is safe to remove the files you mentioned. If there is any doubt, you can move them to a different location instead of deleting them, so that you can move them back, but this should not cause any problem.

bayes_journal is a file that keeps track of additions to the bayes_token.db file, so it may not be created immediately.

Do you want to reset the SpamAssassin settings server-wide, or only for a specific account at a time?

 

I was speaking from the perspective of the server administrator, resetting the settings for all cPanel accounts on the server, or for only specific cPanel accounts. Since you are only the cPanel account user, so you would not be able to reset the settings for the entire server. The SpamAssassin settings apply to the entire cPanel account, not to individual e-mail addresses. I apologize for any confusion I may have caused.