I guess the real question would be: Are there are any working tutorials for converting a program to an .8xk?
Could you list the ones you've tried so far, and are you trying to make apps using Basic or assembly? Also please provide us with as much information as you can about what you've tried since it's possible you did something incorrectly. I know I have.
The only one I know of for Basic is Basic Builder. Unfortunately the link to the flash debugger is dead. I have it installed though so if no one has the installer then I could try to collect all the files I have which includes Wappsign and upload to Github, but it's possible I could miss some since I don't know if the installer placed any files in a location I am unaware of. I haven't been able to find it rehosted anywhere either. However, it seems Rabbitsign is being used more now instead, and rightfully so considering the original is no longer supported.
As for assembly here is what I found on Cemetech:
https://www.cemetech.net/forum/viewtopic.php?t=6197&start=0
https://www.cemetech.net/forum/viewtopic.php?t=9414&start=0
https://www.cemetech.net/forum/viewtopic.php?t=10267&start=0
http://benryves.com/bin/brass/tutorials/tiapps.htm — tutorial about signing apps in Brass
The DCS SDK includes a helpful batch file to assemble programs by default with Brass. Kerm modified it slightly in the first link to assemble apps.
While reading these threads people said Spasm could automatically signs apps, but I haven't figured how to do that myself. It is only mentioned sparingly on alberthdev's page with regard to building it. Nothing at all about it in the documentation. ):
(account deleted) 25 Feb 2019 18:12