All mods can make DCS crash, but, generally they work fine. First, mods wich go in Saved Games are easy to install/uninstall quickly (erase) when problem. Mods that go into DCS core should be installed with care, as DCS may become unstable or crash. The best way is to check the forum to see if there are any problems. The best solution for managing mods is to use a mod manager, which allows you to install/uninstall everything securely (for example OvGME). Mods that go into DCS must be uninstalled at each update and then reinstalled. Some mods will prevent multi-flight because they don't pass Integrity Check (IC), but the mod manager allows you to uninstall them in one click. You'll find all the information you need on the modding forum. Fly Safe.