A new version of the Victor 86B multimeters has been introduced over the last several months. It is now confirmed, by a number of users, that both the original and new version use the same USB HID communication and both are compatible with RoastLogger.
See my previous post in this thread, dated 15 November 2014, for details of the visual changes. In this post I stated that the new version was not compatible with RoastLogger. This was based on the advice of one user. It now seems probable that he had been provided with a faulty multimeter. The original post has now been amended/corrected.
I have no information related to any changes to the Victor 86C but it is probable that it has also been changed in the same way and should still be compatible with RoastLogger.