The Lighting Controller

Nope.

oddly enough I have discovered a second laptop with the same behavior. Everything else works except the editor app.

Please confirm that we are talking about the same lightshow.
Here is what we see in Editor, with your lightshow.

I had this happen just last week because I exported my show from my main PC and then imported the show to my laptop. Editor stopped working. I went through all the usual steps to try to fix it but it turned out that my export/import file was corrupted somehow. I have since imported and exported fine. But that one day a week and a half ago it happened. I can't say that this is the same problem but that is what I experienced.

Conclusion,
Oddly, I've experienced this again with a new project and different machines. I created a project in an older version of the software then downloaded an updated version. The files I created in the old version will lock out the editor app. I'll have to re-create the whole show under the new version in order to work with it. When i create a new show using the same version the editor app opens normally. If I switch back to the old one it will not open.

So, not a very nice solution, but at least I can isolate the problem and move on with my life. Luckily all I had done was basic addressing.