While this runs fine on 64-bit Windows (via WoW64), it is not a native 64-bit application. It also does not support Windows 11 as well as newer versions do (though many users report it works with compatibility mode).
The initial June release (19.6.0) had minor issues with long coding helpers on certain Audi modules. Version 19.6.1 resolved those, plus a glitch that caused the “Auto-Scan” to freeze on vehicles with retrofitted virtual cockpits. vcds 19.6.1
For the uninitiated, VCDS allows a standard Windows PC to function as a sophisticated factory-level diagnostic tool. It provides access to the same functions that were previously available only to dealership technicians. This includes reading and clearing Diagnostic Trouble Codes (DTCs), viewing live data, performing output tests, and perhaps most importantly, adapting and coding control modules. While this runs fine on 64-bit Windows (via