A big thanks, fmckinnon!!! We've understood the reason of your problem. This problem will be fixed.
Until fix is ready I can only advise you run in cmd.exe:
Code:
reg add HKEY_CURRENT_USER\Software\Classes\http\shell\open\command /f /ve /d "\"C:\Program files\Parallels\Parallels Tools\SIA\SharedIntApp.exe\" /w \"%1\""
Code:
reg add HKEY_CURRENT_USER\Software\Classes\https\shell\open\command /f /ve /d "\"C:\Program files\Parallels\Parallels Tools\SIA\SharedIntApp.exe\" /w \"%1\""
-this strings repair http and https (WEB).
Code:
reg add HKEY_CURRENT_USER\Software\Classes\mailto\shell\open\command /f /ve /d "\"C:\Program files\Parallels\Parallels Tools\SIA\SharedIntApp.exe\" /m \"%1\""
-this string repairs mailto (E-MAILS).
Please, tell me if it has helped you.