Hi, this can be done super simple in Database, do you have phpMyAdmin login? I hope so... just use the simple option...:
BEWARE - THIS DOES NOT WORK WITH tb >1.5.1 ANYMORE!! SEE NEW OPTION BELOW!!
Select your thirty bees database in phpMyAdmin
Locate the _employee table (the prefix might vary, e.g., tb_employee).
Click Browse and find your user account row, then click Edit.
Under the passwd column, change the Function dropdown to MD5.
In the Value field, type your new password.
(the shop will now turn your new password automatically in a MD5 hash)
Click Go at the bottom right to save changes.
You can now log in to the admin panel.
and you can also find help here:
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