This is a critical question. —it is no longer sold, registered, or supported by Altium (the successor company). Altium’s official stance on legacy Protel software is that they do not provide downloads, licenses, or technical support.
The following sources have been used by retro‑computing and EDA communities for years: protel advanced pcb 2.8 download
files that modern software might struggle to import correctly. Lightweight Performance: This is a critical question