The biggest and the only one real difference between free and commercial is in support of hosts_allow directive, that free version doesn't have. This is of course a serious security enchancement, which we prefer to putin commercial version only, because it carries more serious liability - our customers rely on this feature.
As to selling dbg as the stand alone - we still don't see muhc of a reason for that, because we are making it available for free! Free dbg is usually just one version behind, lots of companies actually use it in their product. Could you give us more details as to why would you like to purchase commercial versionof dbg - we always keep our minds open
and we always listen.
another reason goes lke this - if you need this serious security feature (hosts_allow), that we provide in our commercial version, than you probably need sftp client, ssh tunneleing - and all that stuff. So, you probably need PhpED then too
- which comes with all that security theme.