Your password is not stored anywhere for the security reasons. Hence there is absolutely no way to recover your password if you forgot it. It is also impossible to access your data without a correct password, because the password is used as a key for encrypting the data.
So, if you still cannot remember your password, you should follow this procedure to start from the scratch:
On Phone or Tablet
Uninstall SafeInCloud app and install it again (no extra fee is required).
On CloudRemove the database file manually. See Where is the cloud database located?