is a comprehensive software package used to read and write data to a vehicle's Engine Control Unit (ECU) and Transmission Control Unit (TCU) . It is a professional flashing tool, not an editor, meaning it acts as the bridge to transfer files while you use other software like WinOLS to actually modify the maps.
The "1.20" version is significant because it was the last version where "full" unlocked clones were widely circulated before later versions enforced stricter online dongle checks. A "full" write-up of its modules includes: PCMflash - ECUTools pcmflash 120 full
PCMflash licenses are traditionally numbered based on the number of or the number of supported protocols included. While interpretations vary by reseller, the industry consensus is: PCMflash v1