If you need to use an older version of an Adobe Creative Cloud app (for example a previous version of Adobe Photoshop, or InDesign), this can be done via Adobe Creative Cloud.
To install a previous version of an Adobe CC app
Step 1
Open Creative Cloud and navigate to apps -> all apps.
Step 2
Click the 3 dots icon next to the application and select other versions.
Step 3
Click install for the older version you want to install.
Note
You can install more than one version of an Adobe CC app, just remember to open the correct version you are wanting to use.