I am trying the CC version of Lightroom, but it is very slow. I would like to try the standalone software instead. Is this possible, how do I do it, and where do I download a trial of the standalone software?
You download the standalone version from here: Product updates
However, since the software is identical, only the licensing is different, you are unlikely to see any speed improvements.
Exactly what actions in Lightroom are slow?
Can you provide us with the details of your computer (operating system, 32bit or 64bit, CPU, amount of memory, size of hard disks with amount of free space noted)?