When you subscribe to the Pro version of LimeWire you are given your own URL which is valid for six months. You can download LimeWire Pro, Betas and new versions from this URL as many times as you like for that six months.

I haven't used the autoupgrade feature myself - so I don't know how it works.

If you have downloaded a new LimeWireWin.exe then you may need to double click on the file and follow the instructions. You should close down LimeWire before doing this.

Mark