What is .WBA file?
Custom skin or theme created with MacBlinds, a program used for customizing the interface of the Mac operating system; can alter the look of mac borders, title bars, task bars, progress animations, toolbar icons, the Start menu, and other aspects of Mac.
WBA files are basically compressed .ZIP files that are unzipped when opened with MacBlinds. They can also be decompressed using another Unzip program like WinAce or WinZip if the file extension is changed from ".wba" to ".zip."
Recommended Software Programs to open .WBA file