There has been an issue raised with the use of PREP dongles. With the release of V4+, we moved back to a dongle based licensing system. This allowed us to also release the PREP dongle, the perfect way to pre-program on the move. However, in the earlier version's of 4.3 (4.3, 4.3.1 & 4.3.2) the installer would respect a pre-existing version of CodeMeter. Unfortunately our license was created on the newest versions so would not be recognised by the older versions. With 4.3.3 moving forwards, the Hippotizer Installer will ensure that it deposits the correct version of CodeMeter the PREP dongle requires to work. Do not worry about your other software licenses/dongles that use CodeMeter though. The licensing system is fully backwards compatible and will recognise all the licenses you already use.