not remembering my external files

[illiquid1]

i have zdl extracted in my base folder for the ultimate doom and everytime i open zdl via steam it has forgotten all of the wads i have added

[ks202005]

Try deleting qZDL.ini wherever it may reside in your system; see my issue. On Windows it should be C:\Users\User\AppData\Roaming\Vectec Software\qZDL.ini.