The D-Pro 1.5 ESD installation does not install the help documentation automatically.
The help documentation can be obtained by navigating to \\Dimension Pro Setup Files\Documentation after extracting the contents of the ESD installation. These files are also located in the root directory of the physical D-Pro 1.5 installer and can be obtained by browsing the contents of the disc.
You can also download the help documentation from the link below.
(To read, unzip first. Afterwards right-click on .chm, select properties, and click [Unblock] then [Apply].)