I'd make a backup first, but you can try to edit the JSON of the app using the AGO Assistant. You should be able to see the settings of the search bar in there. Never attempted to do so on a configurable app, but it may be possible.
EDIT: I went and looked, and you can definitely find it and make changes.
Look for the searchConfig property in the app's JSON:
"searchConfig": {
"sources": [
{
"locator": {
"url": "https://maps.co.kendall.il.us/server/rest/services/Locator/Kendall_County_Address_Point_Locator/GeocodeServer",
"_url": {
"path": "https://maps.co.kendall.il.us/server/rest/services/Locator/Kendall_County_Address_Point_Locator/GeocodeServer",
"query": null
},
"normalization": true
},
"name": "Kendall County Address Point Locator",
"singleLineFieldName": "SingleLine",
"url": "https://maps.co.kendall.il.us/server/rest/services/Locator/Kendall_County_Address_Point_Locator/GeocodeServer",
"itemId": "a97f79d5b6964c4c80fd7c93f2b38e05",
"placeholder": "",
"placefinding": true,
"batch": true,
"zoomScale": 10000,
"numBatchThreads": 1,
"ordinal": 0,
"enableSuggestions": true,
"enable": true,
"id": "dojoUnique6"
},
{
"flayerId": "Current_Cadastral_Features_8857",
"url": "https://maps.co.kendall.il.us/server/rest/services/Hosted/Current_Cadastral_Features/FeatureServer/1",
"name": "Parcels",
"id": "dojoUnique8",
"enable": true,
"enableSuggestions": true,
"placeholder": "",
"searchFields": [
"pin",
"pin_dashless"
],
"maxSuggestions": 5,
"displayField": "pin",
"suggestionTemplate": ""
}
],
"activeSourceIndex": "all",
"enableSearchingAll": false
},
- Josh Carlson
Kendall County GIS