this new version of the tester app will check support for arcade magicgate (the keys used on system246 right card port) rather than developer magicgate
This brings the following advantages:
no more need to unplug and replug the cards if they were inserted prior to the test program being launched
better detection of high quality clones (see below)
A fellow developer made me aware of the existence of some high-quality memory card replicas, which use a castrated version of the firmware from an official card in their controller chip. This card is capable of using developer MagicGate, but does not support arcade MagicGate or unknown MagicGate.