Contents activator . Corel Cad 2014 Download Mac Free ITA - Anoomi - Online Music Playlists . Related Articles License keys are the new authorizations as from STEP 7 V5.3. With the new license keys we are implementing a new concept in the licensing of SIMATIC software. Whereas the authorizations up to and including STEP 7 V5.2 were valid only for a specific version of the software, the license keys as from STEP 7 V5.3 are automatically also valid for the earlier versions of the same software. This validity however is restricted only to the programs that are licensed with the license keys. For programs licensed with an authorization only the...