It is possible to modify one or more parameters to some or all songs at the same time, in fact there is a menu in the list of songs called "Modify/Multiple Replacements".
Through multiple replacements, you can modify the artist, title, language, genre, year, rating, time slots, musicline enablement for multiple songs at the same time.

Let's take an example:
we have a certain number of songs catalogued with the genre "EASY SR" in our archive and we decide that all these songs must instead have the genre "LIGHT".

1) go to the list of songs and view all the songs belonging to the EASY SR genre (use the appropriate filter below and then click on SEARCH)

2) now you have to select all the songs, you can do it with mouse and keyboard or with the "Edit/Select all songs" menu.

If you don't want to change them all but only some, then select only those you are interested in by clicking them with the left mouse button + the CTRL key on the keyboard

3) Now you can select the Edit/Multiple Replacements menu.

In the window that appears, change the GENRE box by selecting or writing in the new genre you want to assign

then click on "Replacements", select the "Genre" field and click on APPLY