Windows 10 Version 20H2
DesktopInfo64 Version 3.2 (latest)

In my config I declare centerv=1 and centerh=1. Neither top, buttom, right, or left is set.
I am using 1 monitor only, so I set monitor-mode=0 and monitor-num=0

I start DesktopInfo64 with command line option /f to show as a regular form and I expect the form to be displayed in the middle of my screen.
Result: The form is displayed vertically centered at the left margin of my screen

Snippet of my ini file:

# Sample configuration file
# See the manual for a full description of all options

[options]
# size and position
width=500
formcolor=880000
monitor-mode=0
monitor-num=0
centerv=1
centerh=1
contextmenu=0
nav=1

# font
font-face=Arial
font-size=9