① I successfully upagde the  AdAudit  7.0.0 to AdAudit 7.2.0

② I want to upgrade AdAudit Plus with "ManageEngine_ADAudit_Plus_8_1_0_SP-2_1_0.ppm" and "latest.crt" so that i can get the AdAudit 8.1.0

③  The "Update Manager" says

④ I have never modified any configuration files.