This is a minor version release which contains a series of bug fixes as well as some new features which can be viewed here:
http://docs.octeth.com/docs/oempro/version_log/452/
We strongly recommend Oempro owners to upgrade their version to v4.5.2 by following instructions on our upgrade manual:
http://docs.octeth.com/docs/oempro/upgrade_guide/#section-2
For any questions or if you need assistance, feel free to get in touch with our support team via our help portal.