If you find the 30-node limit too restrictive, consider these free or low-cost alternatives:
Yes. Once activated, the student version does not expire. However, it will always have the 30-node limit. Download Psim Student Version
Let us verify that the student version is useful. Here is a simple project you can build in under 10 minutes: If you find the 30-node limit too restrictive,
To activate, locate almutil_gui.exe (typically in C:\Program Files\Altair\202x\security\bin\win64\GUI ). Download Psim Student Version