I have noticed a very peculiar bug with APTour 1.1.0b9. I am able to create a tour in well under 5 seconds on my machine, but only on the first tour built after a system reboot. All subsequent builds of the same tour with either minor or even no modifications to the profile result in delays in the build requiring up to 20 minutes. Sometimes I just have to kill the process because it hangs at 20%.
Reading that APTour1.1.0b9 has multi-core issues, I have set APTour 1.1.0b9 to only use one of the eight cores. That keeps it from grinding the system to a halt - or at least engaging the onboard cpu overheat fan, but it does not keep it from taking forever (okay 20mins is not forever) to perform subsequent tour builds.
I have also tried deleting all temp files in between builds, but that really didn't do anything.
Anyhoo, I know it is in beta, so I'm not complaining, only bug reporting. Hope it helps. Let me know if you need more info.