how to change question/post slug programatically?

Use ap_after_new_question hook instead of save_post

ap_is_my_profile was called with an argument that is deprecated

Yeh I know about it, will be fixed. Thanks for reporting.

Easily customize AnsPress capabilities and permission for a user role

I tried the latest commit, but it does look different and not seems to load the content:

BuddyPress profile pic functionality overwrite anspress

Go to WordPress discussion setting and select AnsPress avatar. That will solve your issue.

Full width header

Create child theme of AskBug and then copy header.php to new child theme and now remove container class from header.

/register page

Its called TML (theme my login)