Janos I dont know what may cause this. Is Condor in its own directory? (ie: C/Condor... NOT C/programme files/condor)
Try to run the 'create files' in Apt CndrX again and see if it writes the file. AptCndrX is working fine on my my OS Windows10 so its not the OS causing this problem. You may have to start again with that airport
- I have had a bit of trouble when altering the 'Project parameters' - some settings you can change others dont work.
After trying Texture Sol once I now just avoid it as its too much work!!!
If you have written the files again without your texture sol available in the AptCndr>resources folder
it wont have a file to write to the world/textures folder so will just write a blank - probably removing your original file. Make sure the texture sol image is available in the resources folder then write the files again for that airport - that should solve the problem.
Hope you can solve the issue - always keep spare files of your images! Also it helps to put all the airport textures in a sub-folder inside the main airports folder. That way Apt Cndr does not write over your textures all the time (although you will need to edit the .cx to the correct address).