SimLauncher has the option to manage TEXTURE_MAX_LOAD and also LOD_RADIUS. As long as you use this program to load and start your flights, the settings will remain. If and when you use the FSX load/start then the settings will revert to the FSX default of 1024 and 4.5
Various virus checkers will return a false positive on parts of SimLauncher but those can be identified and quarantined.