In order to fix it you just have to update the sesx registry key
HKEY_CLASSES_ROOT\.sesx to AdobeAudition10_sesx
1) Winkey+R, type regedit
2) search for the path HKEY_CLASSES_ROOT\.sesx
3) double click on (Default)
4) type AdobeAudition10_sesx
5) hit Ok, open Premiere again and done