This problem was fixed in 6.0.2.
The following notes.ini has also been added to enhance this fix: "PluginsWarningOption":
Valid Values are: 1 - a message should appear on the Status Bar: "There is no Plug-in to handle the specified object type" 2 - no notification about plugins not found, this is the "Silent" mode 0 or any other value>2 - the warning dialog box should appear (current behavior)
if PluginsWarningOption is not present in notes.ini - the warning dialog box should appear (current behavior)