When you upload a new version, please attach it to the
first message in the thread (click the "Edit" button below the message, then the "Advanced" button to manage attachments.). This makes it easy for people to locate the latest version in what may be a long thread. What people normally do is to make a note of the number of times that the previous version has been downloaded, then delete the earlier attachment, replace it with the newer one, and say "Previous download count: xxx" (or something similar).
If you wouldn't mind doing this I'd appreciate it, thanks.
Please see
this thread for our "upload guidelines", which summarises all these things.
Thank you.