if you saved it as a .csv (comma separated values) i think pretty much any spreadsheet program can open it. or just share it as a google doc would be easier than relying on 3rd party file site
also, consider making the power strike factor thing into a drop down menu so you dont need to input values, just select weapon type: melee, throwing, bow
would be nice if we now had a spreadsheet to punch in your armor weights + WPF, and it showed how much it was reduced