So, I know you have it clearly marked to not save over your existing save, but I accidentally did...... totally my fault.

I just wanted to check out the mod, so I added it, loaded up my save, to save time, and explored the idea. While I was testing it, I made some progress in the base, and accidentally hit save. THEN I realized my pump jacks were putting out 10% of the oil of previously. Then I noticed all the other patches were at 10% too. By then it was too late.

Now my 200 hour save has changes made that I don't know all of them, and how to reverse them. Removing the mod didn't do so.

I tried the editor, but I don't know how much they were putting out before. I checked out the mod settings as you said the 10% feature could be changed in the settings. no dice. now my only hope is to blueprint my progress and start over. Is there any hope?

You would need to call the manipulate_resource_entities function in scripts/resources.lua but with reversed calculations. Should be possible in the game console. Some resource entities that had <9 left were removed and cannot be restored. There will also be some rounding errors (what previously was 21 is now 3 and will be 30).
The setting only affects not-yet generated resources