In the past(it's been a while so I can't give you a concrete date) my effects worked. For some reason, all of a sudden they stopped working. I doubt it's because of a Paint.net update, because I dount Paint.net would break 171 effects. I doubt it's because of corrupt files because I downloaded some of them again(too lazy to dlownload all of them again). I even reinstalled Paint.NET.
Core System
Brand: Self Built
Operating System: Windows 7 Ultimate 64-bit
Case: Cooler Master Stacker 830(black)
Motherboard: ASUS P6T Deluxe V2 1366 ATX Motherboard
CPU: Intel Core I7 920 2.66 GHz
CPU Cooling: Corsair H50(water cooler)
RAM: SUPER TALENT Chrome Series 6GB DDR3 1600
Video: MSI NVidia 512mb 9600GT GDDR3
Sound: Onboard Audio
Hard drives: 10000 RPM 300 GB VelociRacptor
Optical Drives: 24X DVD(+/-)R/RW RAM and (+/-)R DL LightScribe drive
Power Supply Unit: BFG Tech EX 1000W