I have a solution for you. I have added some condition in the plugin which will make it so if you set the individual tax rate of an item to 0 (zero) then PayPal will not charge any tax for that item when you use profile based tax.
Please get a new build of the plugin from here:
Then set the individual tax amount to 0 (zero) for the items that you don’t want to charge tax for. Do a test checkout and let me know how you go.