I'm sort of in the same boat, only on the Mac platform. I've been happily using GearBox with my Tone Port UX-1 and Garage Band for years, but with the upgrade to El Capitan, I can no longer launch GearBox. My understanding is that Pod Farm is what I "should" be running, but I'm just not sure and I can't seem to get a clear answer from anyone. I am not a pro musician; far from it.
My Line 6 Monkey tells me I have the latest version of Pod Farm 2 (which I have never used, and didn't even know I had until recently) but when I try and launch it, I'm told I have no license. When I read the user manual, it's mostly Greek to me about how Pod Farm acts with Garage Band (which I assume is a DAW, but have no idea what DAW actually means). Pod Farm appears to be a Gear Box-type amp modelling, but it's apparently a "plug in" to something, though I can't figure out what.
Because I only barely understand what I'm doing, it's possible that Garage Band does all the amp modelling I need (it seems to have a bunch of options along those lines, but I've never tried them), and maybe I can turf my Line 6 software and just use the UX-1 hardware.
Can someone explain what I need to do to get back to working again? I was in the middle of recording some stuff and now have ground to a miserable and unhappy halt. I've been dead in the water for weeks and am getting very frustrated with an inability to find help on what to do.