Yes! As of November 2019 you can change your own URL name.
For example, your current booking page URL might be bookme.name/example and you would like to change it to bookme.name/special.
URLs need to have at least 6 characters and must contain only letters or numbers, so please keep this in mind when you enter your new URL.
To change your BLAB URL- simply go into your BLAB dashboard, click on Account Settings ( scroll down towards the bottom, Account Settings is on lower left side) and then select the EXPAND button on the line with Page URL.
Once expanded you will see the field to enter your new URL.