Use the MD5 signature to find out which of the files you downloaded is faulty.
If after the download you experience problems in running the installer program, be sure that the size of the file you have matches the size above.
For Windows ONLY: You can also check if the file you downloaded is exactly the same as the one we have here downloading
this tool.
These are the md5 signatures for the WIndows files:
PSV0.2.010.Part1: 598d3de9b925f94f6327bfa4ce45326b
PSV0.2.010.Part2: 3efab6d2eb8bd55f9ef02a6d7029411b
PSV0.2.010.Part3: a2754a8c024d1a90cbef4db8248db649
PSV0.2.010.Part4: 8ec033d42c7d7667734591671ce44478
PSV0.2.010.Part5: 0a45a48de4761bce7732e8eef0f2aef3
If it does not match with yours, redownload that part.