I am also getting this same error. I tried going to the beta and it installs, but it does not open.
I am also not able to uninstall past versions of ChiTuBox (I may have deleted them from the program files without going though the uninstall process). Now I can't do a proper uninstall because the uninstall file is missing. Could this be the issue? I don't remember at this point if I deleted these old version before or after I got the missing MSVCP140.dll error
I also want to note that I tried going back to the stable build and I get the same missing MSVCP140.dll error. Is the pathing need to be reset? It seems to be trying to find the dll files in the wrong location, does anyone know how to fix this?
I was able to correctly uninstall the old versions of the sotware by reinstalling them and then finding the uninstall file in the program files folder. Now they no longer show up in my uninstall window. I then reinstalled the first the stable and then the beta program and again the missing MSVCP140.dll error persists.
So I tried a adding a new copy of MSVCP140 to my windows file and that causes another error. I tried solving this other error without success, but in doing so someone mentioned reinstalling visual studio C++
Finally, I uninstalled my versions of visual studio c++ and reinstalled them and that solved my issue.
Easier fix, go to programs and then find Microsoft Visual C++ 2017 Redistributable there, click on it, hit modify and then repair. There might be multiple based on the system being used, but find the one that matches the system version of Chitubox you downloaded and it should fix it.
The easiest solution I found to this problem in windows 10 was to go into add/remove programs, find visual studio c++ redistributable 2017, click on modify and then when it opens the widow you should have the option "repair". For good measure I did this with the 2015 version also . Windows 7 and 8 should have similar options. This puts the msvcp140.dll file back into the location the executable is looking for it.