The export function for chordsets does not seem to assume the address where user chordsets should be kept (eg C:\ProgramData\Scaler Music\Scaler 3\ChordSets). The manual does not give any information about this either. The settings page could possibly just show the address without allowing change.
Transferring a main track between instances seems to require the main track to be saved as a chordset. This isn’t really a problem but the procedure should really be given in the manual. For a not very savvy user the transfer routine is going to be something of a nightmare.