In Extension Manager, the New Updates page displays all extensions that can be updated. Do the following:
Step 1: Log in to Magento Admin.
Step 2: Go to System > Tools > Web Setup Wizard > Extension Manager.
Step 3: Under Updates Available, click Review Updates to see a list of available updates.
Step 4: Find the jmango360/japi extension, then choose the Update version and click Update to proceed with the update.