There aren't any breaking changes in v2.5, however the full changelog will be uploaded later today. Here's a portion of it:
- wyUpdate now fully supports automatic updating - wyBuild & wyUpdate now require Windows 2000+ (Windows 98/ME are no longer supported) - wyBuild now automatically updates itself (optional) - Drag & drop uses less CPU - Icons are now shown when you drag & drop - wyBuild can now create patches for files that are "in use". - NGEN on both x86 and x64 Windows (aka 32-bit and 64-bit) - Many minor bug fixes.
Documentation on using Automatic Updating is also coming later today (hence the delayed changelog).