Sorry – We had not posted the change log when you raised this support request and hence thought will share the same with you.
Regarding file changes, there are quite a few. Can you pls use a tool like DiffMerge(Mac) or WinMerge(Windows) to check the changes to the source code? This way you can track the changes you have made to the theme files along with those that were rolled out as part of the update. Hope this helps.
I did it already while I was waiting your answer, thank you anyway
But it can be more simple, if with next update you’ll also provide list of changed files, because there is no possibility to have archive with all versions of austin theme to compare anytime you make update