You are welcome with your UAV in Slovenia.
Maximum take-off weight: 5 kilo
Maximum hight: 150 meters / 492 ft.
Maximum horizontal distance: 500 meters / 1,640 ft.
FPV Flights: Allowed, but the pilot must have a Spotter/Observer to view the surrounding area
Distance Airports / Heliports:1.5 kilometers / 0.9 mi. But come on just stay away from Airports/heliports.
Night flights: Prohibited
Prohibited: Not above buildings, vehicles, historic buildings, military zones.
Useful link: Civil Aviation Administration Slovenia (CAA)
Contact information: firstname.lastname@example.org / +386 012446600