The reason why you need to replace the configured widgets
Version 1.1.0 implemets a functionality that let the widgets automatically search for your Volumio device on the network in case it doesn't respond at the confogured IP address. This is quite common in a home network where the router may assign distinct IP addresses over time. In order to properly work the widget needs to store the identifier of your Volumio device. This wasn't done in the previous version and can't be updated.
In order to properly work the previous widgets shall be removed from your home and reconfigured. I'm sorry for this but, as said, is necessary.
If you have any question send me an email.