Version is the version number for the administrator to track the revisions; the profiles or the VPN client does not have to do anything with this version field. profiles.zip is the name of the file or similar to the file, which you have created. MaxSize is the size of the file is the actual size of more than 5000 bytes; it does not have to be the actual file size
Create a new profile and keep it in profiles.zip. You have to create profiles.zip file.
On the VPN Concentrator, in order to tell that a new revision is available, choose Configuration > System > Client Update > Entries. Click on the entry and choose Modify on the Revision field. Enter Update-4.8-1 or something similar.
Try the client connection. The client should upgrade the .PCF file.