IME and IMHO, GE silicone 1 is fine and used often, by small-scale professionals too. Don't use GE II as it has anti-mold additives that are toxic.
Also, it's not so much the kind of silicone that matters because all 100% silicones are equal in my limited understanding. It's the approach. The hands-down best approach is to remove the whole glass panel, clean off the old silicone, and silicone the panel over again. Just redoing the inside seams is a band aid IMHO and in this case low effort = poor reliability.
If worried and/or for extra strength and safety margin, can add a glass strip, e.g., 3/8" thick by 1.5" wide along the bottom, the entire length. That buys a lot of safety. This is how large scale professionals do it.