This used to work but seems to be broken: If I select "Edit" -> "Open Class/Method Definition" I get the following error:

ERROR: Message 'sendClassDefinitions' not understood.
RECEIVER:
class ScIDE (0x1193c23c0) {
instance variables [19]
name : Symbol 'ScIDE'
nextclass : instance of Meta_ScalarPatchIn (0x1190291c0, size=19, set=5)
superclass : Symbol 'Object'
subclasses : nil
methods : nil
instVarNames : nil
classVarNames : instance of SymbolArray (0x1193c2540, size=3, set=2)
iprototype : nil
cprototype : instance of Array (0x1193c2600, size=3, set=2)
constNames : nil
constValues : nil
instanceFormat : Integer 0
instanceFlags : Integer 0
classIndex : Integer 1089
classFlags : Integer 0
maxSubclassIndex : Integer 1089
filenameSymbol : Symbol '/Applications/supercollider-qt-64/build/Install/SuperCollider/SuperCollider.app/Contents/Resources/SCClassLibrary/scide_scqt/ScIDE.sc'
charPos : Integer 0
classVarIndex : Integer 528
}
ARGS:
Symbol 'SinOsc'
CALL STACK:
DoesNotUnderstandError:reportError 0x11db6a0a8
arg this =
Nil:handleError 0x11db9af18
arg this = nil
arg error =
Thread:handleError 0x11db9c1a8
arg this =
arg error =
Object:throw 0x11db98a68
arg this =
Object:doesNotUnderstand 0x11db59278
arg this =
arg selector = 'sendClassDefinitions'
arg args = [*1]
Process:interpretCmdLine 0x11db2f068
arg this =
^^ The preceding error dump is for ERROR: Message 'sendClassDefinitions' not understood.
RECEIVER: ScIDE

... this should be fixed