If your presets, tags, or ratings disappear the next time you open Omnisphere after saving a preset, tag, or rating, a permissions issue may be the culprit. Omnisphere requires STEAM folder permissions to be set correctly so that it can write files within the folder. To fix the STEAM folder permissions, follow these instructions:
In the Finder, locate your STEAM folder - the default location is:
Macintosh HD / Users / Your Username / Library / Application Support / Spectrasonics / STEAMNote: In Mac OS X 10.7 – 10.11, the Library folder in each User folder is hidden. Select the ‘Go’ menu at the top of your screen while in Finder mode, then hold the ‘option’ key on your keyboard, then select ‘Library’. If you are unable to locate your User Library in OS X 10.12, select the Go menu at the top of your screen while using the Finder, then select Go to Folder; enter ~/Library – then select Go
In Windows explorer, find the STEAM folder:
C:ProgramDataSpectrasonics STEAMNote: The ProgramData folder is a hidden folder by default on Windows 10 / 8 / 7 / Vista, so you'll need to "Show Hidden Files and Folders" in your Control Panel / Folder Options.