Sorry, I misread the inital post. This is about the EULA not the actual application license. Look at the ETK's Preference Reference:
AdobeViewer (PDF Viewer Settings)
This preference category contains the following subfeature(s):
General Application Settings
Summary table
bLaunched Caches whether or not the application has ever been launched.
EULA For Reader, indicates whether the end user license agreement has been accepted by the end user (Reader only).
EULAAcceptedForBrowser For Acrobat, caches whether the user has accepted the end user license agreement for the browser-based EULA (Acrobat only).
sProductInfoCache Caches information about the product.
EULAAcceptedForBrowser
Top>AdobeViewer>General Application Settings>EULAAcceptedForBrowser
Data type boolean: DWORD value > REG_DWORD
Default 0
Version # 7.x and later
HKCU Path AdobeViewer
HKLM Path Not lockable
Summary For Acrobat, caches whether the user has accepted the end user license agreement for the browser-based EULA (Acrobat only).
Details Reader uses the key EULA. If the EULA is not accepted, the application cannot be used and the Updater is also prevented from running. Possible values include:
0: Show the EULA because it has not been accepted.
1: Don't show the EULA because it has been accepted.
GUI mapping The EULA acceptance UI when a PDF is opened in browser.
EULA
Top>AdobeViewer>General Application Settings>EULA
Data type boolean: DWORD value > REG_DWORD
Default 0
Version # 7.x and later
HKCU Path AdobeViewer
HKLM Path Not lockable
Summary For Reader, indicates whether the end user license agreement has been accepted by the end user (Reader only).
Details Acrobat uses the key EULAAcceptedForBrowser . If the EULA is not accepted, the application cannot be used and the Updater is also prevented from running. Possible values include:
0: Show the EULA because it has not been accepted.
1: Don't show the EULA because it has not been accepted.
GUI mapping The EULA acceptance UI that appears on application launch if the EULA value is 0