You cannot change an installed version of IBM® Rational® Software Architect RealTime Edition, Version 7.5.1 beta releases to version 7.5.2. In other words, it is not possible to upgrade an earlier version 7.5.1 beta release of the product installed on your computer to the latest version.
However, Rational Software Architect RealTime Edition, Version 7.5.2 can coexist with an earlier version 7.5.1 beta release installed on the same computer. You can also choose to migrate your workspace and projects to the latest version.