There are instructions on how to remove the daily build on the download page for the daily build. You just have to copy files back into the directory and it's back on the release version. If you were trying to use a daily build, that was likely the problem. I can't get SGP to center with those at all.
POTH is "Plain Old Telescope Handset". It comes with the ASCOM downloads and will be a choice of mount driver in SGP or PHD2. It helps to interface problematic equipment, especially when drivers do not conform to the full ASCOM standard, which TSX does not. In POTH you then choose the ASCOM driver for TSX. If I didn't use this, PHD2 could not slew the mount for drift alignment. It would still guide, but it couldn't slew to a specific location because it did not get GPS coordinates from the TSX driver. If you don't use the drift alignment tool to slew the mount you can have PHD2 connect directly to the TSX ASCOM driver.
Chris