I have found that setting "coins per credit" to >1 seems to make the game reset later whenever I press the start button, after adding credits. (Although I did not try to play using credits with it set to 1)
I remedied this by selecting "factory settings", as switching the coin settings back to default did not fix the issue, even after resetting the game a couple of times.
I played a game no problems on factory settings. I changed the coin settings again, this time to 5 coins per credit, with 1 coin for left slot and 5 for right slot. Free play "No". Coins count correctly, and add credits as desired, but then pressing "start" causes a hard reset where the game goes black for a moment then reboots. Every time.
I did try switching free play to "yes" and back again, but "start" still reset the game. I power cycled and then set free play back to "yes", and played a free game. After the free game I switched back to "no" free play, and the game started and subtracted a credit. I then added some more credits, and the game reset again when pressing start.
Now it seems that I can only get a game to start with it set to Free Play.
Also notice something different with the "clear coin" function. After pressing "enter", the only way out seems to be to power off the game, unlike most other utilities. High score reset locks you in as well.
Games still start on free play, but not with credits, most of the time the machine reboots.
I'm going to re-install the package and see what happens.
P.s. Is it possible to make high score defaults adjustable (or maybe just a little lower) ?
*Updated. I re-downloaded and re-installed the package. The only thing I did was set "free play" to no, exit, add one credit at each slot. Start button reboots game.
Going to install released code and test.
**I have now installed v1.3 and everything works fine again..