You can able to decrypt the AxCrypt secured folder by navigating to the Secured Folders Tab from the AxCrypt app. Then Right click on the selected folder (which you want to decrypt) and choose the menu option Decrypt Permanently.
Incase the folder is not listed in the Secured Folder list, then you have to secure the folder again using the Add Secured Folder option from the right click content menu.
Or In windows explorer, right click on the selected folder and choose AxCrypt > Decrypt.
I hope, your problem will get resolved. If not, please write the email to firstname.lastname@example.org with detailed information and screenshot.