Adobe has released the brand new Adobe Photoshop CS5®. We had the opportunity to test it with our ALPA Lens Corrector. Just start Photoshop in 32bit mode and our Lens Corrector plug-in is working as with the CS3/CS4 version. 

How to run Photoshop CS5 in 32-bit and 64-bit modes

Source: Support pages Adobe

To run Photoshop CS5 on Mac OS as a 32-bit application:

1. Select the Adobe Photoshop CS5 application file, installed by default in the Applications/Adobe Photoshop CS5 folder.
2. Choose File > Get Info, and select Open in 32 Bit Mode. 
   
   Deselect this option to run Photoshop CS5 in 64-bit mode.

To run Photoshop CS5 in Windows as a 32-bit application:

1. Close Photoshop CS5.
2. Navigate to the Program Files (x86) > Adobe > Adobe Photoshop CS5 folder..
3. Double-click the Adobe Photoshop CS5.exe file.