On windows XP 32bit installer extracts in folder on desktop and exits. It is no name 3.3.1 in folder name. To find 3.3.1 and not previous, I should see time of creation of each folder on desktop.
When I start setup from that folder, it installs ok.
Fridrich can't reproduce it here. I'll close it, but feel free to reopen with more infos if needed.
My be I can provide some useful information about this. If You have minute, please, paste here link on information about this windows installer and how debug it.