Incorrect file associations could be the result of underlying issues within your PC system. As such it is highly recommended to scan your PC for invalid registry entries, unused processes and other unfavourable system settings to identify slowdown issues.
The EPML file type is primarily associated with 'EPC Tools' by Nicolas Cuntz and Ekkart Kindler, Siegen University and University of Paderborn.
EPC Tools is an open source initiative towards a tool for Event Driven Process Chains (EPCs) on the Eclipse platform.
EPC Tools supports the tool indepedent EPC interchange format EPML.
EPC Tools supports the editing, simulation and analysis of the EPC process models.