Yes! You can hide tracks and when you do, your changes are instant.  There's no need to send out new email invitations.

To manage track visibility:

1. Click on RELEASES

2. Select a promo from the column on the left side of the page

3. On the right side of the page, scroll down until you see the track list

4. Click a toggle switch to change between the "hidden" and "showing" options

As an example, three tracks in the promo below are hidden.

*** Hidden tracks are not included in a promo's ZIP download. ***

Here is what the music listener will see: