Make existing blog as homepage – Yahoo

Hi,

We host https://www.watershedpm.com with Yahoo and it creates a subfolder for each WordPress blog by default.

I have a couple of different blogs and want to make an existing (old) blog as the new homepage. Will this be possible?

Current homepage/blog: https://www.watershedpm.com/wpm/

Want to make the following existing blog as my new homepage: https://www.watershedpm.com/pmp/

Any tips/ideas?