HDR PhotoStudio 184.108.40.20608 could be downloaded from the developer's website when we last checked. We cannot confirm if there is a free download of this software available. HDR PhotoStudio relates to Photo & Graphics Tools.
According to the results of the Google Safe Browsing check, the developer's site is safe. Despite this, we recommend checking the downloaded files with any free antivirus software. This program was originally developed by Unified Color Technologies.
From the developer:
HDR PhotoStudio HDR photography software has been discountinued and replaced with HDR Expose.
HDR Expose 2 is the pro’s choice for creating stunning and color-accurate HDR images.
This major upgrade incorporates 26 new or improved features making it a full-featured application and not just a tone mapping utility. HDR Expose 2 ships with Adobe Lightroom and Apple Aperture export plug-ins.
You may want to check out more software, such as ArcSoft PhotoStudio 6, CodedColor PhotoStudio or ArcSoft PhotoStudio Paint, which might be related to HDR PhotoStudio.