MultiWalk can be installed as trialware. It will activate all MultiWalk Pro license features for a period of two weeks. After this time, you can either request an extension or purchase the software. Please use this period to assess whether you would like to purchase a MultiWalk or MultiWalk Pro license. Because of this, refunds are not typically necessary since you have had time to evaluate the software before purchase.
However, you can still obtain a full refund, less PayPal fees, within two weeks of purchase. PayPal fees are typically 3% of your purchase price.