Notes about the PVTS file extension:
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 PVTS file type is primarily associated with 'ParaView' by Kitware, Inc.. ParaView is an application designed with the need to visualize large data sets in mind. ParaView is available as an open-source system. ParaView is a turn-key visualization system built on top of VTK that makes VTK easier to use with a point and click interface.