Q: How I could disconnect my eBay account I have connected already to SkuGrid and link another one?
A: To switch your eBay account, simply delete all of your existing items out of sku grid by going to Advanced --> Delete All Items from Sku Grid. Sku Grid is not directly connected to your eBay account, so it's as simple as removing your items.
The rest depends on the repricing method that you're using to reprice your items. For example, if you're using the chrome extension, then just update your chrome extension with the email address that you use for logging into the other eBay account.
And remember to only log into the correct, new eBay account using google chrome. If you need to access the other (old) eBay account, please use a different browser (i.e. firefox) otherwise, you will end up sending the wrong data to and from the wrong account because the extension uses whichever eBay account is logged in your chrome browser at the time.
If you're using Sku Fetch then, you will need to go to the Sku Fetch Marketplace Settings and update your settings there for each lister to make sure that everything is relevant to the new eBay account.
And lastly, you may have to edit the information in your listing template and template texts to match your new eBay account. This is in your templates settings in sku fetch.