After upgrade to Android 6 Apps on SD Card are gone

Help please!!!:scream:
I updated to Android 6.0 today. Prior to that I moved some apps to the sd card for backup.
Now I can not find the apps on the sd card anymore but there is a folder called .android_secure which contains files ending with .asec. Are these files related to my missing apps?
How can I open it? One app (ColorNote) contains very important information I really need back. Hope for help. Thanx.

Oops, duplicate. Please continue here:

@sm74: It’s sufficient to post in the forum, no need to PM me directly.