App Horizon

Horizon Support | Ultimate Help Thread


I just tried, same results. Nothing changed. Wouldn’t be a big deal if you could still log in to use diamond tools. Cant use any of the FM4 tools without logging in though :confused:


Is it just me or is anyone else having massive problems downloading the software. IM a very experienced software engineer and yet I’ve tried for so long and I keep getting looped to the main page or sent to crapware sites. Is there Just a direct download link anywhere? (I’ve tried different machines and networks and browsers)


Use the direct download link below and you’ll have no issues. And Welcome to HorizonMB!

Download Horizon:

  • Type of Problem : unable to download
  • OS : Mac OS X v. 10.5.8
  • Antivirus/Firewall : None. Added exception to windows firewall, still not working.
  • Errors : None
  • Extra Information : Unable to open installer with my older version of OS. Do you have a download link for this version?


There is no mac version.


Problem: Invalid runtime…?
OS:Not 100% sure, but I’ll say Vista as my best guess.
Firewall: None
Errors: Correct runtime cannot be found.
Extra:I have no idea what this means. Program does not crash, but never even opens. Double clicking doesnt help, keeps saying it can’t find the correct runtime for this program. I downloaded the installer and all. This worked on my last home computer, but not this laptop.


I am looking for Borderlands 2 but cant find it, I did an index search and found it, very new to this app.

Help please…


I don’t believe Horizon has a Borderlands 2 editor, but you can find one here.


Like Zodiac said, just use the gibbed save editor. But you will need to extract the SaveGame.sav file using horizon. (You will find it in your bl2 save’s content tab)

  • Type of Problem : Horizon fails to start on Win XP (windows XP SP3)
  • OS : Win XP SP3
  • Antivirus/Firewall : None. Added exception to windows firewall, still not working.
  • Errors : Horizon has encountered a problem and needs to close. We are sorry for the inconvenience.
  • .Net frameworks installed: 1.1, 2.0 SP2, 4.0
  • Extra Information : Error report shows:

EventType : clr20r3 P1 : horizon.exe P2 : P3 : 533b8a36
P4 : mscorlib P5 : P6 : 4889dc80 P7 : f96 P8 : 80
P9 :

According to this thread to run horizon on Win XP you need both .Net 3.5 and 4


Start by installing .Net Framework 3.5, get it here:

You may also want to try a fresh install of Horizon after downloading from this link:



I installed .Net 3.5 SP1 and it starts now :smile:


After this update I did today Horizon wont work at all, It just keeps saying Horizon has stopped working and windows is checking for a solution. I know its the update because I uninstalled it and re-downloaded it several times to try and figure the problem it gives limited usage of the modding tools without the update but once I updated it, it just doesn’t work


Uninstall Horizon again, and then reinstall after downloading from the link below.

Download latest Horizon:


Did what you said and it is still doing the same exact thing


Sorry to hear that. Try this, uninstall Horizon again, and then go to Windows search and type in %localappdata%, locate the Daring_Development_inc folder and delete it, then try installing Horizon again.

You may also want to try reinstalling .Net Framework 3.5. Get it here:

Good luck.


trying to replace .gpd with modded one but it keeps saying object reference not set to instance of object


No matter what I do it just won’t work…


What to do if it says program incompatible?


Try downloading from another browser