TX16Wx is 100% free. However, if you really like this software, please consider supporting its development by donation or purchasing a license for the TX16Wx Professional Edition.
TX16Wx for Mac requires OSX 10.7 or higher.
TX16Wx for Windows requires Windows XP SP3 or higher.
Beta builds of TX16Wx can be found here.
Bug reports, feature requests and suggestions can be made at the official CWI forum at KVR.