Back in The Games Factory Pro I'd click the item in the side bar, and it would select all of that items in the level, then I'd hold down Ctrl and click on one of them and it would deselect it. Then I'd press delete and they'd all go apart from that one.
In MMF2, when I click on the item in the side bar it selects them all, which is good, but I can't Ctrl click on one of them anymore to deselect it. Now it just goes through different selecting option of that object such as rotate etc.