How to add a new device family to Quartus II?

[Altera_Forum]

When I installed Quartus II 11.1sp1 on my PC first time, I only chose Cyclone IV E as a supported device. 

Now I need to make a project for Cyclone IV GX and would like to add a new device support for it. The Quartus II installer seems not have such a function and forced me to uninstall the current one.  I'm wondering if anyone could tell me how to add a new device family to the currently installed Quartus II.

[Altera_Forum]

Hi, in my opinion, you can install the 11.0_devices_windows again, choose your prospective devices family, then it will be OK... 

Hopes it can help you....

[Altera_Forum]

go to Start > All Programs > Altera 11.1sp1 > Modify ACDS

[Altera_Forum]

Thank you. Now I can start my new project with Cyclone IV GX.

[Altera_Forum]

Hello, 

 I would like to add also a new device family (Stratix IV) to Quartus II 10.1 sp1. Unfortunately I have no ACDS.  Can somebody give some hints?  Thanks in advance