A few months ago I designed myself a page, not realizing that where I had placed my large pane coincided with the subeta editing tools. I haven't been able to delete my custom CSS because the window is covering the button that lets me save my deletion!

Perhaps there is some sort of mod that can help me out on this one.

Try site preferences --> Profile --> Reset v2 Profile?

that's so awesome, it worked! thank you so much :D