Linked Helper stores all data locally in Chrome. Some users want to clear Chrome cache very or often or use extensions like CCleaner. Clearing Chrome cache manually or by other extensions can delete data & the license from your computer https://medium.com/linked-helper/important-linked-helper-data-storage-2a8d73a38e0d?source=---------8--------------
Separate Chrome instance is just another way to start Chrome browser, which you already have, but ask it to use another folder on your computer to store user data.
Installing separate instance is one of workarounds.