Where can I get older versions of AVRStudio as my PC is too slow for AVStudio6!
Atmel have hidden it but you can still get older versions of AVRStudio 4 and AVRStudio 5. The last version of AVRStudio 4 is v4.19 but this may have a tool chain bug so it can't automatically load assembler and C compiler and you have to manual add them. To avoid this, install AVRStudio 4.18 and then install Service Pack 3, SP3.
Click here for link to Atmel site