Hello:
Although Scruffyduck (Jon Masterson) may wish to offer personal input on this when he gets some time, generally speaking:
AFAIK, ADE does not write info in Windows Start Menu > Programs list; typically it is in its own sub-folder chain that can be deleted.
Are you saying you un-ZIP-ed the ADE Development version 1.79x directly into the root of your C: drive, and you need to (re)-move it ?
If so, create a sub-folder on your C:\ or other drive letter, and place the ADE 1.79x ZIP file
inside that folder
before un-ZIP-ing it.
Then compare the files and folders you accidentally un-ZIP-ed into the root of your C:\ drive with those in the (new) ADE sub-folder.
That way you will know what loose files from the (intended) ADE main folder and any (intended) sub-folders under ADE ...to delete.
NOTE: If you created / saved any ADE projects for P3Dv5 while ADE was in the root of C:\, by default they will be in a sub-folder.
Typically, that will be in:
[Airport Design Editor 179 install path]\P35\Projects\ sub-folder.
Feel free to inquire further if you have questions.
GaryGB