I just recently upgraded to ASDM 7.52 running on ASA 9.21. I can't load the previous version of ASDM and when I tried to uninstall the old and install the new from the local website I get 401 Unauthorized when trying to browse to the https site.
# ssl trust-point ?
configure mode commands/options:
Available configured trustpoints:
ASDM_Trustpoint0
ASM-ASA
ASM-SSL
LOCAL-CA-SERVER
_SmartCallHome_ServerCA
self
# ssl trust-point AS
# sho run asdm
asdm image disk0:/asdm-752-153.bin
asdm history enable
# sh run http
http server enable
http server idle-timeout 1440
http 0.0.0.0 0.0.0.0 inside
http authentication-certificate inside
sho run all ssl
ssl server-version tlsv1-only
ssl client-version tlsv1-only
ssl encryption aes128-sha1 aes256-sha1
ssl trust-point self inside
ssl trust-point self outside
ssl certificate-authentication fca-timeout 2
ssl certificate-authentication interface outside port 443
