There is already a find option, but how about a replace option too? For example, the apostrophe character. Sometimes people use and sometimes people use ' and other people use other ascii characters for it. Personally, I prefer '. Anyway, there is no way for me to change all the to ’ in Jaikoz. So a find-replace would be killer (not just for apostrophe characters, but for any character in a particular column).
Also, have you ever tried Magic File Renamer? I have to be honest, the only reason why I don’t solely use that is because your program has smart-matching and the musicbrainz lookup and MFR doesn’t. But other than that, Magic File Renamer has some really badass features. You can build renaming functions and all kinds of stuff. The reason I bring it up is I was curious if you were considering building that type of functionality into Jaikoz? I would really recommend checking it out if you have not.