diff --git a/src/__mocks__/service.mocks.js b/src/__mocks__/service.mocks.js
index 422636b..d6416a1 100644
--- a/src/__mocks__/service.mocks.js
+++ b/src/__mocks__/service.mocks.js
@@ -54,8 +54,13 @@ export const mockOsService = {
 export const mockCodexGlobals = {
   getPublicIp: vi.fn(),
   getTestnetSPRs: vi.fn(),
+  getEthProvider: vi.fn(),
 };
 
 export const mockCodexApp = {
   openCodexApp: vi.fn(),
 };
+
+export const mockMarketplaceSetup = {
+  runClientWizard: vi.fn(),
+};
diff --git a/src/handlers/installer.test.js b/src/handlers/installer.test.js
index bcbbff0..1d4dfe3 100644
--- a/src/handlers/installer.test.js
+++ b/src/handlers/installer.test.js
@@ -3,8 +3,9 @@ import {
   mockShellService,
   mockOsService,
   mockFsService,
+  mockConfigService,
+  mockMarketplaceSetup,
 } from "../__mocks__/service.mocks.js";
-import { mockConfigService } from "../__mocks__/service.mocks.js";
 import { Installer } from "./installer.js";
 
 describe("Installer", () => {
@@ -32,6 +33,7 @@ describe("Installer", () => {
       mockShellService,
       mockOsService,
       mockFsService,
+      mockMarketplaceSetup,
     );
   });
 
@@ -109,9 +111,22 @@ describe("Installer", () => {
       expect(installer.installCodexUnix).not.toHaveBeenCalled();
     });
 
+    it("returns early when marketplace client wizard returns false", async () => {
+      installer.arePrerequisitesCorrect.mockResolvedValue(true);
+      mockMarketplaceSetup.runClientWizard.mockResolvedValue(false);
+      await installer.installCodex(processCallbacks);
+      expect(processCallbacks.installStarts).not.toHaveBeenCalled();
+      expect(processCallbacks.installSuccessful).not.toHaveBeenCalled();
+      expect(processCallbacks.downloadSuccessful).not.toHaveBeenCalled();
+      expect(installer.isCodexInstalled).not.toHaveBeenCalled();
+      expect(installer.installCodexWindows).not.toHaveBeenCalled();
+      expect(installer.installCodexUnix).not.toHaveBeenCalled();
+    });
+
     describe("prerequisites OK", () => {
       beforeEach(() => {
         installer.arePrerequisitesCorrect.mockResolvedValue(true);
+        mockMarketplaceSetup.runClientWizard.mockResolvedValue(true);
         installer.isCodexInstalled.mockResolvedValue(true);
       });
 
diff --git a/src/handlers/processControl.test.js b/src/handlers/processControl.test.js
index 705884a..6386104 100644
--- a/src/handlers/processControl.test.js
+++ b/src/handlers/processControl.test.js
@@ -10,9 +10,11 @@ import { ProcessControl } from "./processControl.js";
 
 describe("ProcessControl", () => {
   let processControl;
+  const mockEthProvider = "mockEthProvider";
 
   beforeEach(() => {
     vi.resetAllMocks();
+    mockCodexGlobals.getEthProvider.mockReturnValue(mockEthProvider);
 
     processControl = new ProcessControl(
       mockConfigService,
@@ -195,7 +197,12 @@ describe("ProcessControl", () => {
       expect(mockShellService.spawnDetachedProcess).toHaveBeenCalledWith(
         exe,
         config.codexRoot,
-        [`--config-file=${configFile}`],
+        [
+          `--config-file=${configFile}`,
+          "persistence",
+          `--eth-provider=${mockEthProvider}`,
+          `--eth-private-key=eth.key`, // duplicated in configService.
+        ],
       );
     });
   });
diff --git a/src/services/configService.js b/src/services/configService.js
index 84d0d7e..66dd594 100644
--- a/src/services/configService.js
+++ b/src/services/configService.js
@@ -94,7 +94,7 @@ export class ConfigService {
     this.fs.writeFile(
       this.getCodexConfigFilePath(),
       `data-dir="${datadir}"${nl}` +
-        `log-level="TRACE"${nl}` +
+        `log-level="DEBUG"${nl}` +
         `log-file="${codexLogFile}"${nl}` +
         `storage-quota=${this.config.storageQuota}${nl}` +
         `disc-port=${this.config.ports.discPort}${nl}` +
@@ -105,7 +105,7 @@ export class ConfigService {
         `bootstrap-node=[${bootNodes}]${nl}` +
         // Marketplace client parameters cannot be set via config file.
         // Open issue: https://github.com/codex-storage/nim-codex/issues/1206
-        `${nl}`,
+        "",
     );
   };
 }
diff --git a/src/services/configService.test.js b/src/services/configService.test.js
index 990fe61..2a83342 100644
--- a/src/services/configService.test.js
+++ b/src/services/configService.test.js
@@ -112,6 +112,33 @@ describe("ConfigService", () => {
     });
   });
 
+  describe("getEthFilePaths", () => {
+    const result1 = "path/to/key";
+    const result2 = "path/to/address";
+
+    it("returns the key and address file paths", () => {
+      const configService = new ConfigService(mockFsService, mockOsService);
+
+      mockFsService.pathJoin = vi.fn();
+      mockFsService.pathJoin.mockReturnValueOnce(result1);
+      mockFsService.pathJoin.mockReturnValueOnce(result2);
+
+      expect(configService.getEthFilePaths()).toEqual({
+        key: result1,
+        address: result2,
+      });
+
+      expect(mockFsService.pathJoin).toHaveBeenCalledWith([
+        expectedDefaultConfig.codexRoot,
+        "eth.key",
+      ]);
+      expect(mockFsService.pathJoin).toHaveBeenCalledWith([
+        expectedDefaultConfig.codexRoot,
+        "eth.address",
+      ]);
+    });
+  });
+
   describe("validateConfiguration", () => {
     var configService;
     var config;
diff --git a/src/ui/mainMenu.js b/src/ui/mainMenu.js
index e58f587..8dcb365 100644
--- a/src/ui/mainMenu.js
+++ b/src/ui/mainMenu.js
@@ -91,12 +91,12 @@ export class MainMenu {
   };
 
   startCodex = async () => {
-    // const spinner = this.ui.createAndStartSpinner("Starting...");
+    const spinner = this.ui.createAndStartSpinner("Starting...");
     try {
       await this.processControl.startCodexProcess();
-      // this.ui.stopSpinnerSuccess(spinner);
+      this.ui.stopSpinnerSuccess(spinner);
     } catch (exception) {
-      // this.ui.stopSpinnerError(spinner);
+      this.ui.stopSpinnerError(spinner);
       this.ui.showErrorMessage(`Failed to start Codex. "${exception}"`);
     }
   };