There seems to be a bug with the plugin when launching the reg.exe process. I develop on Windows 8.1 and my path to Genymotion folder is:
C:\Program Files\Genymobile\Genymotion.
But the launch process seems to add both a backslash and regular slash to create a path to reg.exe. Which makes it a faulty path and ends with not being able to launch the plugin.
Copied from eventlog:
13:40:39 Genymotion: Loading Genymotion library 13:40:39 Genymotion: Genymotion directory: C:\Program Files\Genymobile\Genymotion 13:40:39 Genymotion: Trying to initialize engine 13:40:39 Genymotion: Launch process: C:\Program Files\Genymobile\Genymotion/reg.exe 13:40:39 NullPointerException: null
I had the same issue today. To solve it I did the following steps:
After these operations the Genymotion icon on Android Studio toolbar worked. I also tried to run Android Studio as a normal user and it worked successfully.
Hope this helps