I totally understand the frustration level.
here's where I'm at, and tell me if I'm making any mistakes so far-
The .ini file I changed the one Mouse= to = Touchscreen. The other mouse = is DX (I think, from memory) and states it's for dos only, ignored by windows.
On the ELO properties I changed to one touch versus double tap.
Windows 7 mouse properties don't have the one click/doubleclick any more. everything I could find in the Googles said the only change you can make is in the Windows Explorer properties, setting single click there, which I did.
A quick test last night and it still wasn't working.