Can't update because SugarPHPMailer.php permissions are 6444 instead of 755

I want to upgrade SuiteCRM 7.10.9 with SuiteCRM 7.10.10. When I begin the upgrade, the test says it’s impossible because include/SugarPHPMailer.php has incorrect permissions 644.
I tried to change permissions to 755 or delete the file by FTP but I can’t. I just have a normal user FTP account, not a root account. All other files are 755.
How can I update ?

Search this Forums for amariussi’s permissions script, that might work.

It was a problem on the server of EX2 (file quarantined by their @^|@][\][\)antivirus@^|@][][).