You've opened PluginManager and under VST configuration "options" you have your "scan path" set to pf/cake/vst
(its shorthand I know) you've got the two "re-scan" buttons ticked?
Then you've hit the "Scan VST Plugins".
Kontact was picked up but not SD.
IIRC, the SD installer drops the sd.dll in the VST folder, not a toon sub folder.
Try moving the dll into the pf/cake/vst folder, then scan and see if Sonar picks it up.
I organize all my dlls in sub folders with no issues, but...
I wonder if somehow Sonar's new "by manufactuer" and "by type" is somehow confused.
I'm not in the studio and only have EZD on the office rig (its fine with EZD), I haven't run SD
on the latest Plat update out in the studio.
T