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.
Juniper EX4300-48T-AFO 48P 1GbE 2 PSU Switch
$279.00
Juniper Networks EX2300-C-12T 12-Port Ethernet Switch
$375.00
Juniper Networks EX3400 48-Port 4-SFP PoE+ Running Junos P/N: EX3400-48P Tested
$399.99
Juniper EX3300-24P Juniper 24 Port Gigabit PoE+ Switch - Same Day Shipping
$104.00
JUNIPER EX4550-32F-AFO 32-PORT 1/10GbE SFP+ ETHERNET SWITCH Tested/Reset
$749.99
Juniper QFX5100-48S-3AFI 48 SFP 10G 4 QSFP+ 2x SFP/RJ45 Mgmt Back-Front Airflow
$799.00
Juniper EX2200-24P-4G 24 Port PoE Gigabit Switch SAME DAY SHIP 1 YEAR WARRANTY
$44.99
Juniper QFX10002-36Q 36Port 40G QSFP+ /12 port 100G QSFP28 144 SFP+ Dual AC PS
$4500.00
$250.00
Juniper (EX2200-C-12T-2G) 12 Port Managed Compact Switch
$75.00