B4A is now a 64bit program, as was the beta, and the default location for 64 bit programs is 'Program Files'. Previously B4A was a 32bit program and the default for those is 'Program Files (x86)'. You can uninstall the old 32bit version in Control Panel -> Programs and Features.
You are probably looking in the old 32 bit folder for Libraries. Those 'missing' libraries are additional libraries, not official ones, so should have been located in your additional libraries folder - not that of the B4A installation.