According to our records, your support has expired a while ago. Please kindly renew it via this page and try installing the latest VisualGDB 5.6 Beta 4. If the problem persists, please let us know and we will help you get it working.
Thanks for renewing your license. The slow build might come from the GNU Make tool used by the ESP32 projects. Please make sure your project uses CMake and Ninja, and not the legacy GNU Make. You can recheck it via VisualGDB Project Properties -> CMake Build Settings.
If this doesn’t help, please try exporting the configuration and build command lines from VisualGDB to batch files as shown here. Does running them manually also result in a slow build?