I've seen mentioned in a couple of places (including https://www.pcblibraries.com/forum/disclaimer_topic2478.html" rel="nofollow - here ) that the upcoming V2020 release of Library Expert will tweak the default calculation slightly, including dropping the manufacturing tolerance to 0.00 and increasing all negative solder joint goals to 0.00.

Is it possible to make V2019 use the default V2020 calculations? How should the V2019 parameters be adjusted to match the default V2020 settings as closely as possible?

In my own case, I'm using a preferences file that I think I originally based on an IPC-7351C file that used to be included with Library Expert. Looking through the Terminals tree in Settings, it looks like all my fabrication and placement tolerances are already 0.00, and I don't see any negative numbers anywhere. Is it possible my preferences are already aligned with the V2020 defaults?

V2020 will be out in Beta at the end of January with just the Calculators completed. V2020 reads V2019 FPX files and you can carry over your Preference file, but Preferences are being changed to Options to match Microsoft Windows technology. 

Even though the manufacturing tolerances will still be turned on, anyone can change them and all the solder joint goals to whatever works best for you. 

We're currently working on a series of educational posts for this Forum that will shed light on all PCB library issues. Need to compare IPC-J-STD-001 with IPC-7351. 

Next 7 coming soon, updates on these topics - 

Collapsing and Non-Collapsing BGA's, Thermal Pads, Zero Component Orientation, Local Fiducials, Polarity Marking, Footprint Naming Convention, Tolerances