Shoutbox

Yes, you have.
Here, change 

xml code:

---

<MsgVersions>
                    <Version Major="8" Minor="5"/>
                </MsgVersions>

---

to

xml code:

---

<MsgVersions>
                    <Version Major="14" Minor="0"/>
                </MsgVersions>

---

[Current messenger version is 14.0.*.*, hence Major 14 Minor 0]

Also, some pictures and strings have changed their IDs since Messenger 8.5, check out the Extracted resources folder for updated IDs