Try the following:
lxpanel>PCManFM>Edit>Preferences>General
Uncheck first box under 'Behavior' if you don't like single click.
I have been using a double-click action on the mouse for well over twenty years (Amiga, Mac, Wintendo, SunOS, Linux (KDE and Gnome).
Knoppix seems to want a single-click to open files and icons in the LXDE file manager.
I googled and tried to find the setting in preferences but cannot. I did see this very old thread - http://knoppix.net/forum/threads/457...on-desktop-etc. - but the solution doesn't seem to be relevant any more.
Any help?
Try the following:
lxpanel>PCManFM>Edit>Preferences>General
Uncheck first box under 'Behavior' if you don't like single click.
IBM xSeries 206m Server 1x Pentium 4 3.2 GHz 1 GB Ram No OS No HDD
$109.95
Lenovo IBM System x3650 M5 8871 Server Xeon E5-2620 v4 x 28 128GB RAM No HDDs
$199.99
IBM 3837-AC1 X3850 X6 CTO SERVER
$400.00
IBM X3530 M4 1U SERVER XEON E5-2620 2.10GHz 128GB No Drives
$100.00
IBM S822LC 8335-GCA Power 8 2U Server 2xPower8 8core/64t 128GB RAM Tested
$695.00
IBM SYSTEM X3200 M3 7328AC1 Server INTEL XEON X3450 8GB SEE NOTES
$46.55
IBM Power S824 8286-42A 2x Power8 CPU 2x 32gb memory No HDD 12Bay 4U Server
$400.00
IBM 4262 SYSTEM x3200 Tower - HDD Wiped, NO OS
$80.00
IBM 7063-CR1 Power7 CPU 01HL709 32GB RAM Hardware Management Console Server
$552.49
IBM 8231-E2C Power p730 Server, 3.55GHz 16 core, 2 x EPC3, PowerVM express
$595.00