I agree 100% with what JeffVolp said. It sounds like you have issues with signal strength, and not with the software.
I had all kinds of seemingly random problems with signals in my house. As soon as I'd solve one issue, I'd find another one.
I ended up buying an XTB-IIR from Jeff, which was something I should have done years earlier. You may want to hire an electrician to install it if you're not comfortable adding circuits in your breaker box. However, it really DOES work.
Even with that, however, I still had some strange issues. Electrical noise can be really tricky to find, especially in my case. I had a few lights that wouldn't respond, but only at night. Turning off EVERY breaker in my house didn't fix the issue. I was beating my head against the wall trying to locate any source of noise in my house (especially with everything shut down).
It ended up being a neighbor (across the street), who had a pair of CFL bulbs in the fixtures next to his front door. One of those was going bad, and was creating enough noise on the powerline to travel all the way back up the lines, and down into my system. As soon as he unscrewed the offending bulb, everything went back to normal.
Fortunately, he is a good friend of mine, and he was more than happy to help me troubleshoot.
I bought him a pair of new bulbs.
The moral of the story, I guess, is not to give up just yet. If you haven't done so yet, I suggest mapping out which outlets, switches, and appliances are controlled by which breakers, and try to determine if you have an issue only on one phase or with a few specific circuits. There are lots of posts here detailing exactly how to do just that. It doesn't take very long to do (and it is even faster with a good helper), and you may just find the cause of your problem that way.