Login to your Account and click the profile button at the top right of the screen.
On your Profile page you will see a little edit button right under your user picture, click it.
On the Profile edit page, you will be able to add your PayPal account to your KLEKT account.
Simply add your PayPal address and your PayPal account will be added.
If you still have any questions, feel free to contact us through our Support button.