Clarification
I should clarify my post. You can install this upgrade just for the sake of playing around with it because it does leave your existing version completely untouched. I should also tell you any files you create with the Cloud version are not compatible with previous versions, or at the very least has some bugs in it. Even when I exported a file from Cloud to the 10.5 format, opening the 10.5 file in the 10.5 program it had a problem saving any changes. I kept getting errors that the file could not be accessed.
I should clarify my post. You can install this upgrade just for the sake of playing around with it because it does leave your existing version completely untouched. I should also tell you any files you create with the Cloud version are not compatible with previous versions, or at the very least has some bugs in it. Even when I exported a file from Cloud to the 10.5 format, opening the 10.5 file in the 10.5 program it had a problem saving any changes. I kept getting errors that the file could not be accessed.