WARNING!:
If you want's to update from 1.3.70 to 2.0, you have to get rid of all your Vertibirds in any way first.
There will be NO support for any bugs caused by not doing this.
Vertibirds used by 1.3.70 or below are NOT compatible in any way. But storing them first, well allow you to build new ones for free.

Manual install:
Put everything from the rar file, except the ESP files, into your %Game%/Data/ folder
Either rename one of the NeutralVertibirdsXX.esp files to "NeutralVertibirds.esp" or rename the *.ba2 file to "NeutralVertibirdsXX - Main.ba2" - replace XX with your language code.
Put the NeutralVertibirdsNoSchematics.esp into your %Game%/Data/ folder, if you don't want to search for schematics.