Hi ,
As Stephen mentioned, getting back into your project is not a big problem. I opened the DefaultEngine.ini file in your project and noticed that there were two EditorStartupMap=... lines there. If you delete the line referencing your persistent.umap level, save, and re-open the project, you will be able to get in again.
That was the simple part of the issue. Unfortunately, what I noticed when I was able to get into your project was that trying to open any level other than the default level, or trying to open a Blueprint, would cause the same crash to occur. I did not try every Blueprint or other asset that you have in the project, but every Blueprint that I did check caused a crash.
This does not appear to be related to the changes that you have made to your LinkerLoad.cpp file. I tried opening the project using versions of the Engine both with and without the changes to that file and saw the same crash in both. I am going to see if I can get someone on the development team to take a closer look at the callstack for clues to what is happening.
In the meantime, do you recall what you were last working on in the project before this issue started happening?