I got the following error messages:
Your Admin Tools installation is corrupt after installing AT 3.6.8. pro
Missing or tampered files:
administrator/components/com_admintools/config.xml (size 3782 ≠ 3885)
administrator/components/com_admintools/helpers/ini.php (size 5404 ≠ 5649)
administrator/components/com_admintools/helpers/jsonlib.php (size 27416 ≠ 28319)
Apparently not the correct size
I did the following after reading other tickets on this issue
I reinstalld Admin Tools twice (no change)
I deleted the three files and reinstalled Admin Tools twice (error massage: the same, files are there, same size)
Then I installed the files manually with ftp in binary mode.
That did the trick. Now the error message is gone.
Greetings Hans