This problem is well-known, java files (.jar) are ZIP archives and they don’t store CRC value in those files (WinZIP, WinRAR will show also an error message).

why is Avast! unable to scan that 3rd file from the list ? ...it says: error 0x0000A44E. Is that maybe 'cause I hadn't included CAB extension in my ADDITIONAL EXTENSIONS option under resident task settings ?

It means, there’re two readme.txt files in the CAB archive about different size (just information/warning something could be wrong) - we’ll add resource text or I’ll not show that error…