|User since||April 19, 2008|
|Number of add-ons developed||0 add-ons|
|Average rating of developer's add-ons||Not yet rated|
+1 for official version for TB3 Rated 5 out of 5 stars
+1 to get the officially supported version for TB3 of this absolutely needed add-on
In the meantime, I have - succesfully so far - implemented the Max Version and AddUrlAttachment changes described earlier in the comments.
It requires to understand how to manipuate .jar files, which can be opened via any zip tool.