@rafaelvillafane, You should be able to dock Melodyne and use it while keeping it docked. To do this, just create a blank new session.
Add or record a bit of audio and then 'Edit with Melodyne'. 1st thing to do is dock it, then save and close. This will (at least for me) keep Melodyne docked for new sessions. Melodyne will work properly the 1st time you use it, as soon as you close it and re-open, the trouble starts, but it's a known problem with Presonus and it appears to be fixed already, so we will probably see it fixed in the next maintenance update.