With current versions of SketchUp if should not be appearing unless you have absolutely every plugin under the sun loading at startup ans making commands. SketchUp has a top limit on the number of commands it can hold in it's head at any one time - a bit like a woman 😮 ...
When it gets full it starts dumping existing commands and there menu entries gray-out...
This limit was increased dramatically some years ago as more plugins came on the scene and more commands were getting used.
There have been no reports of 'gray-outs' for a long time...
BUT recently one or two tools have been published that deal with many 'commands' and it was suspected that they were inadvertently adding multiple copies of existing commands and thereby filling up SketchUp's limited brain... Once this was realized the tool's code were quickly reworked by their author and updates issued, there have been no 'gray-out' reports in recent weeks/months... Perhaps you have got early versions of some of these and so you need to update them urgently ?
The main suspected-culprit was Aerilius 'LaunchUp' and the two other suspects were the 'Toolbar' manager tools...
If you have bloated SketchUp with a surfeit of plugins then I suggest you get/use the 'SketchUcation Plugin Store' and its 'Managers' - the 'Plugins Manager' lets you easily disable plugins you rarely use, so on a restart of SketchUp they don't load... that way you can have a core set of plugins that always load and others that are usually disabled. The disabled ones can always be loaded using the manager - a permanent load adds it back into the core set, while a temporary load adds it to the available tools for that session only - on a restart it is again disabled... This way SketchUp starts up much quicker and your menus are not cluttered with rarely used tools...
The 'Plugin Store' let's you keep up to date with the latest versions of your favorite plugins too... 😉
