PayPal Plus. Problem with rounding

I would like to update from version 1.7 to 2.0. I have a rounding problem with the current version (1.7) As soon as there is more than 1 product in the shopping cart, the order with PayPal does no longer work, because there is a difference in the total price calculated by Nopcommerce and PayPal.
Does Version 1.8 and newer really solves this problem? If so, how can I update the plug-in?
It is enough to upload the new version 2.0 via the Nopcommerce plugin management. Will this overwrite the old version overwritten and will the configuration retain? Or do I have to do it differently?
Thank you verry much.

Don't uninstall plugin.
Download the new release and upload it using FTP or nop admin mode.
Restart your store.
Plugin will have the same settings.

I advice you to enable 'Don't pass order items to PayPal' on plugin configure page. It will solve your problem.