How do I install the Quartus II Subscription Edition if I downloaded it separately?

Please follow the steps below to install.
(Explain using Ver.11.1 SP2 as an example)

1. Install Quartus II Ver.11.1 Subscription
2. Install device
・ It is recommended to download, select, and install all families of devices.
3. If you use Nios II and DSP Builder, install them.
4. Install Quartus II Ver.11.1 Service Pack2
- SP1 information is included in SP2, so there is no need to install SP1.
5. If you have installed 3., install the related ServicePack2

* The Service Pack in the Subscription version is a difference. If Ver.11.1 is not installed
Service packs cannot be installed.
* Please be careful not to install Quartus II Ver.11.1 SP2 before installing the device.