I'm still using version 3.2. How do I upgrade to the latest version?
just download the new .exe and run it in your folder.
some new settings are available so you will possibly need to tweak the config file
The old configs are not compatible. You have to make/use a completely new config file. So i suggest you start from scratch.
But the present version 3.3.4 seems to have some issues, so maybe you want to wait a little bit longer.