Too many staff line on a page.

I have 7 pages with four lines (with notation and tab for guitar) on each page. My final page has five lines on it and has pushed one last line onto a final page 8. I'd like to have four lines per page and bump that final line of page seven to 8 to at least get two lines on the final page.

I'd actually like to figure out a way to pull everything back to seven pages but I've torn this thing apart trying to figure all this out. I need help. I've included the file in case you need it.