This setting takes effect immediately.
Detailed explanation:
With OS/2, each menu item (be it a submenu or a "real" menu item) needs a unique menu ID within the context menu. This is a number from 0 to 0xFFFF, identifying the menu item to the system, so that the "owner" of the menu can react when a menu item is pressed.
IBM recommends that every WPS developer use a number higher than WPMENUID_USER (which, on Warp 3 and 4, is 0x6500) for context menu additions.
Previous versions of XFolder
always used WPMENUID_USER+100
(dec) and above for the variable menu items, but this
has conflicted with other software.
Since XFolder has no way to find out which offset other
WPS sofware might use, this setting is now
configurable; XFolder will now use menu items with at least WPMENUID_USER
plus the number you specified here.