To be able to use the latest UI for NativeScript 3.0.4 you should also use the NativeScript 3.0.0.
Regarding that if you are using NativeScirpt CLI, you could upgrade it by using the following command:
npm install nativescript --g
Then to update all needed dependencies you could run:
command and to update UI for NativeScript
tns plugin remove nativescript-telerik-ui-pro
which will remove the plugin and:
tns plugin add nativescript-telerik-ui-pro
to install the latest version.
In case you are using app builder, you could review the article here
, where it is described how to manage the plugins in your app. For configuring the target NativeScirpt version, you could review this
resource from the documentation.
About the node_modules
folders. You could simply open the root folder of the project and delete them.