SoD_SP plugin.

In all versions of the plugin – 1.15c, 1.16.1, 1.16.2 – the settings are not saved. When attempting to save the modified plugin settings, a message appears stating that it is not possible to save, the file does not exist, or there is write protection enabled. There are no Cyrillic characters in the game path, "Read-only" is not enabled, and the HD mod version is the latest. Win7 x64.

What should I do, where should I look for the problem?