Open FL Studio
Load your vocal preset in the Mixer insert
Select the mixer track for your vocal
Add the preset effects in the desired order
Save the mixer track as a preset
Right-click the mixer track name
Choose Save mixer track state as
Name the preset
Save the preset file
To reuse it, open the Mixer
Select an empty mixer track
Right-click the track name
Choose File
Choose Open mixer track state
Select your saved vocal preset
Load the preset onto the track
Route your vocal audio to that mixer insert