A hotfix release v1.21.0613 was released tonight to address an issue where when launching GridTracker and other logging programs that all try to sync their LoTW logs at the same time, the LoTW download abuse mechanism is triggered causing errors. This is a temporary fix where we’ve disabled automatic downloading of LoTW logs at start-up. LoTW logs can still be downloaded by clicking the LoTW icon in the control panel. The long term fix is in the works and should also speed up the time it takes to pull down LoTW logs.
This new version of GridTracker can be downloaded here.