Without gyro

@Ryo a text editor is any external program that can edit text

@pedro16797
Where is text editor? I couldn’t find it. Please tell me.

@Ryo sadly you'll have to go one by one. One thing you can do is edit the xml file in a text editor that allows for search/replace

@pedro16797
Thanks for reply.exactly you’re right.all of parts’s stability modifier is max. However,I can’t fix it minimum because number of parts are too many. Please tell me how to select all of parts

Sorry for the late response. Your use of the stability modifier has basically made the craft impossible to rotate. I would recommend against the use of that slider, as it doesn't make things more stable as you may think, it increases the inertia tensor scale. What that means is that it makes it so the part groups need a lot more energy to be rotated. That makes things more stable, but if not used properly it can break crafts.