How do i delete these modded crafts? (1.12) SOLVED!

[Hadron27]

So i downloaded this "bluedog" mod QUITE A WHILE AGO and i deleted the files and it was all fine, Now that i have a NEW COMPUTER. <<<<<<< Somehow, the files creeped onto my computer without downloading or cloud save.  Can someone tell me how to delete only the modded ones? Some of them are quite tricky to figure out if its stock or not, so i want a good soluteino please! 

https://imgur.com/a/64qUI77

Update: i went to the wiki and there was a list of all stock crafts, so i just deleted the ones that werent on that list. but wasnt there a stock arine 5?

Edited June 30, 2021 by Hadron27

[The Aziz]

You can either launch the game and check if some of them appear as having "invalid part modules" or something like that in VAB;

Or open the files with any text editor (because they're literally just text files) and look for parts that do not sound stock.

[jimmymcgoochie]

1. In the VAB, open each craft in the list one by one.
2. Anything that doesn’t load due to missing parts, delete it.
3. Profit?