Whenever a new program is installed, new folders are created in the registry containing some settings about that program. This is not different for SolidWorks. Deleting or renaming the Solidworks registry folder will erase any trace of the previous settings and the software will generate a new set of registry keys on the next launch.
Materials from Ultimaker include the trusted PLA with its print friendliness, the flexible TPU, the wear-resistant Nylon, and several others that would make this list too long to include. Apart from the standard Ultimaker filaments, the platform also accepts material from 3rd party filament brands, leaving you spoilt for choice when going about a material selection exercise.