Decon STDesign 3.1 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. The following versions: 3.1 and 3.0 are the most frequently downloaded ones by the program users.
The program's installer file is commonly found as STDesign.exe. This free program was originally created by Decon USA. Decon STDesign is suitable for 32-bit versions of Windows XP/Vista/7/8/10/11. We cannot guarantee that the program is safe to download as it will be downloaded from the developer's website. Before launching the program, check it with any free antivirus software. The software is included in Photo & Graphics Tools.
From the developer:
STDESIGN is the final version of the software that was previously available as BETA ,most of the changes were simply resolving issues that came up due to specific unusual geometry and load combinations. The main calculation subroutines are otherwise unchanged.
You may want to check out more software, such as DeconMSn, which might be similar to Decon STDesign.