There was a download of mentalMAX 7.5 on the developer's website when we last checked. We cannot confirm if there is a free download of this software available. The software lies within Photo & Graphics Tools, more precisely 3D Design.
This program was originally produced by Mental Automation, Inc. We recommend checking the downloaded files with any free antivirus. This PC software works fine with 32-bit versions of Windows XP/7/8/10/11. The following version: 7.5 is the most frequently downloaded one by the program users.
From the developer:
MentalMAX is electronic design package which includes the following software:
-Schematic Entry Software- mentalMAX includes the easy-to-use, powerful SuperCAD schematic entry software. SuperCAD comes with nearly 2000 parts including most TTL and CMOS logic, opamps, discrete symbols, and others--plus you can easily add custom symbols.
You may want to check out more software, such as KeyCreator or FRED Optical Engineering Software, which might be related to mentalMAX.