Quite a few months back, I had used a third party theme v 2.9 in my wordpress site. I made a few custom changes to css/.php based on my needs. Now, I plan to upgrade the theme to v3.8.
Before doing that, I wanted to get the diff of changes that I had made to ver 2.9. As I didn't have a copy of the original theme, I contacted the developers of the theme; unfortunately, they also don't seem to have a copy of that.
What are my options to obtain the diff, get an original copy of the theme? Does wp store a copy of original theme somewhere? My site is hosted on bluehost.