How to continue development of Asterisk GUI?

Question is in the title.

I’m Asterisk user (On a SYNOLOGY NAS). Was working fine with Asterisk GUI but since last Asterisk updates, no longer possible to use it efficiently.

How to continue Asterisk GUI development (Even if no longer supported by Asterisk) ?

Political / Commercial / Functionnal issue somewhere to explain why not already done ?

Find an appropriate tag URL, or select the trunk one, from check it out with svn and then modify it yourself. It is unlikely that you will get any help in modifying it.