.sil files contain anonymized debug logs generated by MetaSetup, MetaInstaller, Uninstaller or MetaLoader. Files will be generated in the same folder as .exe is run. Make sure your .exe has write permission into that folder, otherwise you may face an error as soon started with debug mode.
.sil files are essential in order to debug a problem case, please send them only to our support email. If they are too big, please .zip/.rar them for convenient management.
Refer to other description how to start apps in debug mode, not all applications are automatically debug enabled.