I have just downloaded the latest update of Lightroom, of which Creative Cloud kept telling me was available. I ended up downloading this via the internet site as the Creative Cloud App wasn't working (already forums on this; the wheel just keeps spinning). So I have no got the latest version and it is now asking for a Serial Number. I have entered serial numbers assoicated with my Adobe membership however it is not recognising this. Not sure what to do from here; I shouldn't have to buy it again! I use a Macbook Pro
If you are subscribing to the Creative Cloud you cannot use the normal Perpetual License download.
They are different the Creative Cloud version of Lightroom will be automatically activated/licensed via the Adobe Creative Cloud application. The perpetual version of Lightroom has to be activated by inputing the License Key manually.