I also experienced the same installation failure as previously described when attempting upgrade from 2.6.0 from a non-service type install. I also went through the additional step of first uninstalling Resilo and then re-installing as non-service and the error repeated. However, after again deleting the software and reinstalling but this time as a service no errors occurred and the software is syncing as expected showing version 2.6.1 as active. This indicates to me that developers have an error in the installation / upgrade portion of their software that needs to be addressed. In case they happen to be monitoring this thread I am using Windows 10 Home OS build 17134.285 version 1803.