I´m experiencing the same issue
Here is the goverlay tester result:
Report generated at: 20/06/18 13:10:30 PM
------------- GOverlay Tester ------------
--> Version 0.5
--> Arguments :C:\Users\Nando\Downloads\GOverlay_Tester_v05\GOverlay_Tester.exe
------------- OS Info ------------
--> Version: 6.2.9200.0
--> Name: Microsoft Windows 10 Pro
--> Windows is 64 bits
------------- File Drivers Check ------------
System32 located at: C:\WINDOWS\system32\
LibUsb0.dll not found
drivers\libusb0.sys not found
------------- LibUsb Driver Status ------------
LibUsb Kernel version: 0.0.0.0
------------- Related Devices Connected ------------
--> LCDsysinfo (GOverlay)
----> Service: 0
----> Description: LCDsysinfo (GOverlay)
----> Manufacturer: 0
----> DeviceID: USB\VID_20A0&PID_41EC\LCDSZ
----> Status: 28
------------- Devices Detected ------------
------------- LibUsb Utility Devices Report ------------
------------- Listing all USB Connected Devices ------------
Strangely, my goverlay was working properly and now this happens.