The extension PP4 marks bitmap images in the format of Micrografx Picture Publisher Version 4.
Micrografx was acquired by Corel in 2001 and most products have been renamed, discontinued or integrated into other Corel products.
Most often resolving problems with opening PP4 files is very simple. Just install an appropriate program that supports such files. All of the listed programs support PP4 files, but may vary in offered function and purpose. Some programs may be capable only of viewing contents of PP4 files or offer file conversion options, but may not be capable of editing such files.
It is possible that although a compatible program has been installed on user’s system, it is not used by the system to open it. This may happen because no default application was associated with this type of files. To associate PP4 files with given application, select "Open with" from drop-down menu (accessed by right-clicking on the file). Then select from the list the program or application you want to be used to open this type of file. If the CorelDRAW applications is not on the list, select "Browse" option in order to manually locate the directory where CorelDRAW has been installed.
Sometimes problems with opening PP4 files may not lie with the application itself, but can arise due to other causes, such as: