The paths are not supposed to be the same. LyX 1.4.1 did not install a python directory under LyX. Also the batfiles are not the same. This usually happens when the preferences files under c:\documents and settings\yourusername~~~\~ are not deleted during the uninstall. Then the next version picks up the old preferences and sometimes doesn't work right. Maybe you have more than just two copies of LyX installed, 1.4.1 and 1.4.2. You can do a Windows Search for the filename lyx.exe and see if if reports more than two instances on your C drive. Also do a search for "preferences".
Ok. I did not uninstall old versions of Lyx because I'm always worried about upgrading to a new version when an old one is working fine and not being able to open older documents with the new versions. So I have in the Lyx directory four subdirectories Lyx1.3.3, Lyx1.3.5, Lyx1.4.1 and Lyx1.4.2 that contain the four different installs.
I only have one "preferences" file in .lyx directory though. Leo
