Windows XP (SP2) I have been using v1.9 for a few years now. Today I tried v1.16. It runs OK with no parameters (i.e. no help file to open) but it hangs upon attempting to load simple .chm files that it v1.9 had no problem with. For example, the .chm file that comes with Microsoft's Process Explorer found here:
The main window outline appears with a dark gray interior, then it's white and then I kill it.