The trial version for PIC 16F628A let you modify the ignition timing but has less features than the full version and expires after 20 CDI starting.
The LED will count down the remaining starts (20 to 0)
Once the Free Trial has expired, the CDI won’t start any more and LED will stay steady ON.
To burn a Microchip 16F628 PIC, you need to have a PicKit3 or PicKit2 programmer.
Checksum = 016F