Issues when downloading the flat file from Server local to local desktop using WINSCP GUI

Hi, In my application i am supposed to download the .csv file from server location to local desktop through WINSCP. When i open the downloaded file and convert to .xlsx or .xls, the characters in the column after 18 digit is getting truncated.

Using WINSCP Version 4.2.7 on Windows 2007
Can any one help me regarding this issue?

What make you believe this has anything to do with WinSCP?

Anyway, you really need to upgrade WinSCP.