First reboot your Lucca and and when it reaches the second screen, the one stating that you should not drive and use the device, tap the following sequence on the touchscreen:
-> Tap on the upper-left corner
-> Tap on the upper-right corner
-> Tap on the lower-right corner
This should get you to a factory settings screen, there you just have to click on the lower-left button, the one with “File Explorer”
And there you go, an explorer window appears =) So, browse to the “Windows” folder and click on “ChangeUSB.exe”. In this new window, choose “ActiveSync”. Reboot you Lucca.