I am a student with a concurrent license of Arcmap. My arcmap 10.5 seems to have a default listing or arcmap extensions in it that i can check out. When I go to ArcGIS administrator to add extensions no extensions are checked even though I have them cheked out in ArcMap. When I check new extensions i want nothing goes wrong and it seems to download perfectly, yet every time I reopen arcmap no new extensions show up on in the extensions window. How do i fix this? There is 1 forum online where two people had the same problem but never received an answer.