PSPX6 cannot open 16-bit PNG images as 16-bit

[photodrawken]

Two issues with PSPX6 unable to open image files:

1. An image saved from RawTherapee as a 16-bit PNG image is described and opened in PSP as an 8-bit image. (The image is described in Windows Explorer as having a 48-bit pixel depth.)

2. A TIF image saved from RawTherapee as a compressed 16-bit image cannot open in PSPX6 -- the error message says "Invalid file".

Both images open OK in the two-year-old Photoshop Elements 10 as 16-bit images. Both images also open in XnView; with a message, however, stating that they will be converted to 8-bit.