A useful tool for finding what have been changed between two versions of JForum

When it comes to upgrading to new version of JForum, it is painful to find out what have been changed/updated, especially if you have customized the html template files.
This time I found a good tool called DiffMerge to compare two versions of JForum's war files in exploded directories.
Just follow these steps:
1.You can download DiffMerge from https://sourcegear.com/diffmerge/. And install it.
2.Download jforom-2.3.4.war and jforum-2.3.5.war.
3.Uncompress these two war files by some kind of unzip tool(for example 7-zip).
4.After DiffMerge installed, execute it and use it's File>Open Folder Diff... function, and choose the jforum-2.3.4 and jforum-2.3.5 folder to compare the difference.
5.Then you could find out what have been updated by new version of JForum.