Reset the original settings

Hi, I am newcomer from Inventor on a computer which was used previous from somebody else. Getting the SW working I can see (comparing the help and user manual instructions) that the interface is somehow corrupted with missing features in the toolbars and the parts/assembly tree. How do I reset the original settings? Do I have to reinstall the whole program? Is it necessarily a special upgrade for accessing and using the triad movements?

Please help.

Thanks and regards

G

SolidworksGeneral