There is a problem of opening a Project file in an earlier Powerdirector version than the one that created the .pds file.
You can open a PD 12 created project in PD 13, but if you save those changes in PD 13, PD 12 can not open that project.
There may be a difference of the CODECs in PD 12 vs PD 13.
There should be a right click menu, Open With, lets you choose what program to open a file type. If you check the always use... Check mark, that program will be the default program to open that file type. Normally the lastest version of Powerdirector installed is the Program to open project files (.pds).
Carl312: Windows 10 64-bit 8 GB RAM,AMD Phenom II X4 965 3.4 GHz,ATI Radeon HD 5770 1GB,240GB SSD,two 1TB HDs.