When you install Jumble Saler, you need to run the eBay Link Wizard which will ask you to sign into eBay with your eBay username and password and then Jumble Saler collects an access token from eBay. You can disable your copy of Jumble Saler's access at anytime by logging into your eBay account and then disabling in the 'Third Party app access' part in you eBay account settings:
Just put a tick in the 'Jumble Saler' check box and then click on the 'Revoke' button.
How to remove the Jumble Saler database on your computer and auction pictures
To remove information on your eBay listings, eBay watch list and searches, remove Jumble Saler using Windows "Add and Remove Programs". After you have done this, then please remove the Jumber Saler database which is located at in Windows Explorer in your JumbleSaler folder within your Documents folder: