Not sure if this is the right place to post this.
Do you have a test site where I can check out the options in the pro version to see what it is like before I buy it. Would like to see this option to upload attachments in pm's that I don't see to have on this site
No there is no test site with this running. There is only two options in the pro version for Attachments in PM's, disable it completely, and select which usergroups can upload attachments.
Here is what a user would see if they can upload attachments in PM's.
Did you set your usergroup in the setting, Usergroups Allowed? If so, and the pm you are viewing was sent to multiple users, the default location for it to show is below the PM message area.