Yes, I've tried to put the single file in the exclusions list (D:\Archivio\Compiled\RSH.exe), but it doesn't work. After that, I've tried to put the whole folder (D:\Archivio\Compiled\*)... but it still doesn't work.
My english is not so good, so I'm not sure what you mean with "please check whether you don't have a typo in the excluded path"... if you mean I must check for mistakes in the string, I've already checked it, and it is all correct.
In this topic called "Big Fat Trouble", I've mentioned two different files (located in two different paths) considered as infected by Avast! (the trojan is the same, "Win32:Trojano-1205 [Trj]"). I know that the trojan identification is a false positive for both files. After the suggestion given by cvsa, I inserted the FIRST file in the exclusions list, and it was OK. But with the SECOND one, no way.