That's excellent news the problem is fixed.
I'm on an older mac 2008 & open in 32-bit works for myself. I have an issue when it's disabled. No doubt your newer machine handles 64-bit much better.
As BigJx pointed out, the option for sharing programs is the first option window in WS preferences window.
If you ever have a situation where you haven't used WS for a long time, perhaps a year & WS struggles to connect, then close WS & delete the gnutella file from the WireShare preferences folder. WS will access fresher information online to recreate a gnutella file next time you open WS.
LPE does not possess this ability.