Hello, Peter:

3.40 starts fine

3.50 does not start at all, no error msg

Info from 3.40 -> Help -> System Info:
============================================
Application
Product name : PMView Pro for Windows
Version : 3.40
Build : 24108
Graphics
Screen size : 1600x1200 pixels
Bit depth : 24 bits
Plane count : 1 plane
Uses palette : No
Raster caps : FFFFEEB9
Screen
Physical size : 338x254 mm
Resolution : 120x120 dpi
Processor & memory
Number of CPUs : 1
CPU family : 6
CPU model : 7
CPU stepping : 2
Page size : 4096 bytes
Physical RAM : 639 MB
Operating system
Operating system : Windows 98
Version : 4.10 A
Build : 2222
============================================

What info can I provide, and how? I do not know the debug command line parameter or logging parameters for the Win version.