Hi,
first, as mentioned I would try a clean installation of v5.5 removing the previous logs/attempts. (the logs referenced below in this post). Also be sure to try the full offline installer.
Those don't seem to be the logs we need.
Please send us the installation logs if you have trouble with v5.5. These are in the installjammer registry directory. The folder may be hidden and is under program files or program files (x86).
Best Regards,
Lisa