If you select the file and right-click to choose AxCrypt then selected the Encrypt option to encrypt the files, AxCrypt knows that it’s a file – so AxCrypt show the bold font.
If you select the folder and right-click to choose AxCrypt then selected the Encrypt option, AxCrypt does not know that it’s a folder, AxCrypt encrypts the folder inside the files only – so Axcrypt shows the normal font.
AxCrypt secures files, individually. However, you can designate folders as ‘secured’. The folders will be monitored for new files, and AxCrypt will secure all new files with a single click, or when you sign out.
If the above doesn’t help, please provide more information about the issue and some screenshots and write a mail to firstname.lastname@example.org.