Hi Epee,
you'll find the "1 osc patch" in the templates bank.
the thing is that if you load it, tweak some knobs, and then close the mini V3, the "modified" osc1 will load when you will open the mini V3 again.
As a workaround i suggest to do a "save as" after your modifications. Then, if you want to start again from scratch, you'll just have to load "1 osc" from templates.
hope it helps,
best,