I use this plugin and I think it's great!
I usually download rather than stream, which works very well most of the time.
Two times recently I have changed the HDD in my receiver, which has resulted in the VOD download location being reset to 'none'.
This would not be a problem, but if I try to change it in the 'main settings' my box just hangs.
I have resolved it both times by editing the /etc/enigma2/settings file and putting the location in there.
I then have to power the receiver off without shutting it down so that it does not overwrite the settings. All is OK after this.
The EPG download location did not need resetting on either occasion.
EPG location is /media/hdd/
VOD location is /media/hdd/movie/
I am running the latest OpenVIX build with 4.17 plugin. The device is a GigaBlue UHD UE 4K (gbue4k)