Remove . after path to prevent confusion

default_app/main.js

@@ -259,7 +259,7 @@ function loadApplicationPackage (packagePath) {
     try {
       Module._resolveFilename(packagePath, module, true)
     } catch (e) {
-      showErrorMessage(`Unable to find Electron app at ${packagePath}.\n\n${e.message}`)
+      showErrorMessage(`Unable to find Electron app at ${packagePath}\n\n${e.message}`)
       return
     }