I no longer have an option to change the size of a cabinet that was downloaded from the warehouse. The dialog box is no longer there when I right click on the component.
Is it “Dynamic component”? The Dynamic Component Options window is not in the context menu - has never been - but you can open it from the Window menu or the Dynamic Components toolbar.
The Dialog box isn’t in the context menu, but you can open it from there. Right-click->Dynamic Components->Component Options.
Make sure you’re actually right-clicking on a component. Make sure you’re importing the component into a file and not just opening the file.
Sometimes DC just crashes and restarting SketchUp fixes it.