The update to v1.0.1 is just files update and no database changes. Because of this you can easily update the version using 2 methods :
- Using the diff files provided by the tomatocart team (www.tomatocart.com/downloads/diff-files.html). This needs a little bit of knowledge of svn and patch
- You can download the new release and copy all files over the existing files (don't forget to backup
), al your storel data is stored in the database, so you don't loose anything.
If there are any question just ask

I don't know if the team will provide automatically update trough the admin panel in the future.