It might indeed be an option to secondarily "plane" the originial vibrato via controls (which I asked for, for sure) or to manipulate outcoming audio files with Melodyne. However, it seems a bit the opposite way one would expect, if a vibrato-free sound is created from a vibrato one.
One should be aware that for string instruments obligate vibrato became "fashionable" not earlier than at the begin of the twenteeth century (sic!). Considering that an increasing community detects the "charm" of earlier playing modes, one might expect, that VI will probably not be confronted the last time here with the request for vibrato-free patches.