It’s hard to say for certain without more context, but the string Rockstar.games.social.club.1.1.7.8 looks like a versioned identifier for Rockstar Games Social Club — possibly an installer filename, a DLL version, or a client build.
For the average player, however, it is highly recommended to use the latest official version available through the Rockstar Games website to ensure security and compatibility with online servers. Rockstar.games.social.club.1.1.7.8
If you are troubleshooting but don’t absolutely need this specific version, consider: It’s hard to say for certain without more
Rockstar force-updated every client. Unlike Steam, which lets you pin versions, the Social Club was—and remains—a silent patcher. One morning in October 2015, 1.1.7.8 simply ceased to exist. If you didn’t back up the installer, it was gone. a DLL version