You can change the name of your store from the Members Area > Store page:
HipStamp Store: https://www.hipstamp.com/members/store/setup
HipComic Store: https://www.hipcomic.com/members/store/setup
HipPostcard Store: https://www.hippostcard.com/members/store/setup
To update the name of your store, change it in the "Store Name" field, and then click on the "Save Settings" button.
However, please keep in mind that when you change the name of your store, it may be confusing to buyers, as they may not recognize your new name as the same store they've previously purchased from. Additionally, when you change the name of your store, this may change your Store URL as well - which buyers may have bookmarked to revisit your store. For these reasons, we recommend that you avoid changing your store name frequently.