I've installed LR via creative cloud, and then, some time later, will discover that CC thinks it's not installed anymore. This has happened a few times now, over two different PCs, and I haven't been on CC all that long. Might have happened to PS once, but I don't remember what the exact issue was that time. At least previously, when there was an update I could simply install the update manually, but now the 'download' button tells me to use CC...
For now, I suppose I'm going to have to re-install again, and hope that CC gets fixed before it happens again.