hello and good evening. i would like to download effects like delay, fade out studio, etc. but a dont know how. i changed from windows 7 to windows 10 and a lost some effects in audacity. thanks a lot for your help and have a nice evening. greetings. 
edgardo.
Those effects should be included in Audacity.
Do you mean that you upgraded Windows from 7 to 10?
If so, is your Audacity installation one that has carried over from when you had Windows 7?