My license also expired. So I filled out the form on free-entry-toolchain.hightec-rt.com/ again with a bit changed information but the same MAC Number (because the same PC). The license key they send me per mail was pretty much the same (akey number; issue date...) and so my easy thought to put the new license file in the old license folder didn't work.
So I tried uninstalling the old Toolchain which first didn't work only with deleting quit a bit manualy. After that I tried to install the Toolchain again but that is also not working because I get the message: "This operating system is not supported". I also uninstalled the Infineon Memtool and Arduino.
Any Idea how to get the Arduino with the Shieldbuddy back working? Or is it a windows bug on my pc.
I solved my problem by using the one year old setup file (126.96.36.199). The new TricoreSetupfile (188.8.131.52) seems to have issues with my Windows 7 Version. I guess that uninstalling all programms was not necessary anyway. I checked my new license file and it was pretty much the same as the year old one and was not valid. I guess they checked it because of the same MAC adress.
So I changed my MAC adress in the adapter preferences and applied for another license file now with the new MAC adress. That worked.
I don't use the Shieldbuddy commercially so I hope this work around is legal.