hey mate they are similar, the tm500 was superseded by the tm500 super, the only thing that changed was more ram added to the super.
To backup your receiver you need Technomate Control Center available from technomate own site.
You can get all the latest software from here
you will need a db9 rs232 null modem cable to back up and restore/flash new images to your receiver. If you computer dosent have a serial port you will need a serial converter, ebay is the best place for these items.Code:You need to register to see links. Register.
alternatively you can use the miniweb interface but im sure there's guides on here on how to use this. if you get stuck or need help feel free to drop me a pm