You can use a spreadsheet to edit the details within an export file created with the Export action. Typically there are two types of edit you might like to make
Before using Import make sure you have already loaded your songs into Jaikoz before you use Import because Import does not load songs into Jaikoz it matches against the filename of songs in Jaikoz and updates the metadata when it finds any matches. Import is none destructive, for example although it will only import the first genre if your song has additional genres these will be left untouched.