seems to be fine if multiplayer is off possibly related to known issue : * Custom liveries cause stuttering in Multiplayer. We are currently investigating this issue.
Workaround: From the WORLD MAP menu, select the FLIGHT CONDITIONS button in the upper right corner. In the MULTIPLAYER category select OFF (GROUP ONLY) and make sure to only use standard liveries. Note: If you are flying with someone who has a custom livery, you may experience stuttering.