Calibration routine is the same for these 2 new versions as it was for the previous one (V3.3) so it
will not be affected. V3.4 is the same as V3.3 as far as the entire config file is concerned. V4 adds
some new functions to the menus, these will simply be added to the previous version’s config file when
saved.
If you plan to go back to V3 after loading and saving a config file with V4, the added menu
items could cause menu corruption from arrays being accessed out of bounds if saved in a position
that V3 does not support, so it may be advisable to save a copy of the WPT file in this case before
upgrading.
It’s not a bad idea to save a copy of the config file(s) before upgrading, no matter what versions are
involved, but calibration should not be affected with these latest versions. Also keep in mind if you
have saved any in the additional positions (CONF001.CFG to CONF009.CFG), that although calibration
is not read when loading these files, calibration info is saved in each one, so these could be used as
backups and copied back and renamed to the boot config file (the regular config file “XXXX.WPT”)
if necessary.