Hi, 
Even though the release of the next ZBrush version is close (more information will be posted by Pixolator by the end of this month ) we wanted to make a version of ZBrush 2 available to 64-bit users. This version should run properly on most 64-bit systems with up to 4 gigs or RAM. Please note that if you are running other Windows versions - including the 32-bit Vista - or running the 64-bit Windows and have not experienced any difficulties, then you do not need to get this version.
Downloading the 64-bit Version
New ZBrush users who purchase ZBrush 2 from our website will receive both the 32-bit and 64-bit versions in their download. The executables are clearly named in the ZBrush 2 folder. Run the one that is most appropriate to your system.
Current registered ZBrush users will need to get a new download link from Element 5. They can be reached at 800-406-4966 (North America), +49-221-31088-30 (Germany) or [email protected]. When calling Element 5, you will want to choose option 3 from the telephone prompt, followed by option 1 and then option 1 again. It will help if you can provide them with the order number that you received at the time that you purchased/upgraded/redeemed your coupon, but they can also look up your account using your name, email address, and other identifying information.
All ZBrush 2 registered users have an account with Element 5! If you upgraded from an earlier version, you set up an account on the Element 5 system at the time that you upgraded. If you purchased from a reseller, you set this account up at the time that you redeemed your coupon code that came with the CD or box.
If you received ZBrush in the complete boxed set (whether purchased from our website or from a reseller), the CD will not contain the 64-bit version of ZBrush. You will still need to download this version from Element 5, using the above instructions. This applies to new customers as well as existing users.
Important note for speaking with Element 5: Do not tell them that you need the 64-bit version. This will only confuse the majority of their support reps. Simply state that you need a new download link for your account. We have already arranged for that link to deliver the new file.
Installing the 64-bit Version
After downloading the new file, run it to install ZBrush to your computer. Do not install it to your existing ZBrush 2 folder! The new ZBrush 2 folder will contain an executable called ZBrush2R2.exe. This file is compatible with both 32-bit and 64-bit operating systems. ZBrush will automatically use the license file from your previous 32-bit installation.
After installation, copy any important files (such as plugins, documents, materials, etc.) to the new ZBrush 2 folder. When you are satisfied that you’re ready to remove the old copy of ZBrush from your computer, locate the executable within the ZBrush2\UninstallerData folder and run that. The old copy of ZBrush will be removed along with all of its associated folders and files.
Thanks much, and happy ZBrushing! 
Finally here!
