Restore of 2014 Backups not possible?

I've just upgraded to TI 2015 (build 6525) from 2014 on a Windows 7 x64 system.

I created a recovery disk using WINPE and downloaded plugins.

I thought I'd better check if the recovery works before I really need it. However, when I boot the recovery and go in restore it doesn't show my backup files? It shows other files but none of my TIB files? Even if I set the filter to show all files none are shown. If I go into other folders it sees other files types but none of the TIBs!

I have 64 backups files which were all created by TI 2014. Are these not compatible with 2015?

If they're not there should be a warning before upgrading as it could be a serious inconvenience.

Thanks