I bought a box set Lightroom 6 just few days ago, but when I'm going to install the software, I noticed that LR6 could not be installed to my 32 bit system. How can I do ? Can I downgrade the LR6 to lower version ?
Lightroom 6 does not run on 32 bit operating systems.
You need to upgrade your operating system to 64 bits
Adobe does not sell anything but the current version. So you won't be able to downgrade through Adobe.