Yep it’s not simple
It’s a caveat emptor situation
Now 4540
But this time we have a change log to peruse
So I repeat my previous advice backup before you try any new software
But I do echo the OP we do need some guidance on this it’s been to long without a firm update and we know that the 4300 has errors and dev. Has come a long way since then to the end the ESS current does not play well with the current public mach4 release