Norton 360 SONAR Protection problem!

I receive Mail / messages / statements from my Bank thorough the Bank's secure website . ( Link to download )

Every link / file has a different name but all name  extensions are in EXE !!!

That's how the Bank working .

The problem: The  360 SONAR can"t "learn" the file's name ( to ignore / trust ) it because the name of the file is different every time .

To solve the problem I have to disable the SONAR for a short time .

Can someone advise me please for another solution ?

Thanks