Read plugin version

Development Pipeline & Plugins Plugins
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2

Try this:

FString PluginName = "MyPlugin";
FString LatestVersion = "1.4.1";

IPluginManager& PluginManager = IPluginManager::Get();
TArray<TSharedRef<IPlugin>> Plugins = PluginManager.GetDiscoveredPlugins();
for(const TSharedRef<IPlugin>& Plugin: Plugins) {
	if (Plugin.GetName() == PluginName) {
		const FPluginDescriptor& Descriptor = Plugin->GetDescriptor();
		if (Descriptor.VersionName != LatestVersion) {
			// Invoke your update code here
		}
	}
}

For an example, have a look at the end of this file: https://github.com/EpicGames/UnrealEngine/blob/f8f4b403eb682ffc055613c7caf9d2ba5df7f319/Engine/Source/Editor/ContentBrowser/Private/NativeClassHierarchy.cpp