4D Test Application to explore Ethereum based blockchains.
You should open the .4DProject file using 4th Dimension v18 from 4D, that should be available from January 2020 (or you can use beta version if you are a 4D Partner.)
You have to create a record in Preferences with the following info for your Ethereum blockchain; for example you can obtain these keys from Infura
Name: Default
Value: {
"id": "",
"secret": "",
"endpoint": "",
"name": ""
}