Cause: Corrupted user preferences.
Fix: Delete the default.usr file in your Proteus 91 installation directory and restart the software.
Once you have the best Proteus 91 download file (usually a .zip or .exe): proteus 91 download best
Once you have the best proteus 91 download, here is what to explore first: Cause: Corrupted user preferences
The only legitimate and legal source for Proteus software is Labcenter Electronics. The only legitimate and legal source for Proteus
Unlike the cluttered ribbons of newer software, Proteus 91 features a classic toolbar interface. It is less intimidating for beginners. This simplicity makes it the best teaching tool for introductory courses on digital logic, analog electronics, and embedded C.