I looked around for a fix that supposedly existed and found this file. Tested it out and was able to use the program and save my progress.
1) install Zbrush 4r5 full (MD5: 478c0ab9b8f7cdfe084d4ec685c0a90f)
2) activate using xforce keygen
3) copy Patch4r5.exe to same folder as ZBrush.exe
4) run Patch4r5.exe
enjoy!
Download click [here]
