Been using Evoscan for 8 or 9 months to log with.
Until last week the AFR's logged using my LC-1 use to read correctly, but now all read very rich 5.0 - 7.0.
I've checked in Logworks, and the AFR's are all still correct, but Evoscan is giving strange results.

Is there a setting somewhere, they may have changed?

 

I know you said you checked the settings in logworks but did you check the settings in the LM programmer? I am having issues with my LC1. For some reason it seems every month The settings magically change in the LM programmer to custom. In logworks it still says gasoline but the LM its custom. Give that a shot if that fixes yours you need to do a heater calibration again