Replaced all direct Directory.Delete calls by our new custom FileSystemUtilities.TryDeleteDirectory class and method for safer and more robust directory deletion throughout the codebase with automatic retries (3x 150ms), recursive deletion, handling of read-only attributes, rename-then-delete fallback, and better error handling. Also moved the WebView cleanup to happen earlier on initialization, before creation of the WebView environment
Refactored all file download logic to use DNS fallback and applied it to 7-zip and WebView2 runtime downloads. Moved WebView2 runtime download logic to GetDependencies and ensures it is downloaded at startup if missing. Added robust handling for corrupted user.config files in Program.cs, including auto-repair and fallback guidance.
Introduced DnsHelper to detect system DNS failures and fall back to Cloudflare (1.1.1.1 / 1.0.0.1) DNS resolving, with caching and helpers for downloads. When fallback is required a lightweight local proxy is started and HTTP_PROXY/HTTPS_PROXY are set for spawned rclone processes so rclone uses the proxy’s DNS resolution; the proxy is cleaned up on exit. This finally resolves the very common ISP DNS blockage issues of users.
Updated all FlexibleMessageBox.Show invocations to include Program.form as the parent form. This ensures message boxes are properly parented to the main application window, putting them infront of the main window, instead of behind it.
Removed the splash form, associated images, and all references to splash screen logic from the project. Refactored startup logic to run directly, with improved asynchronous initialization and cleanup.
