FabFilter User Forum
Q3 / Q4
Hi there,
I have the Q4 license and I get some projects from other studios who have Q3.
Is it possible to open the Q3 with Q4? or to have a license for Q3 as well?
Thank you for your help,
Christos
Christos Zorbas — Jun 6, 2025
It's not possible to automatically replace Pro-Q 3 with Pro-Q 4. But when you own Pro-Q 4 you will also get access to Pro-Q 3.
Your account automatically offers you a license key for earlier versions of plug-ins that you own. First log into your account: www.fabfilter.com/myaccount
Click 'View license key' next to your most recent order for a plug-in, e.g. Pro-Q 4. Then, click on 'View license keys for earlier versions' in the top-right corner of the page. The license keys for earlier versions will now be displayed.
You can download all earlier plug-in versions here:
www.fabfilter.com/support/downloads
I had this experience just today..
Bought (Q4) in an emergency whilst in a mixing theatre to open a composers stems...
Anyway, have been trying to activate/request password via - the link provided. To no avail.
Has cost me a heap of expensive mix theatre time.