And then, other try.
Please, if you have any other UFD, empty, that works fine, try the following:
Load an new SecureAccess_win.exe, in this new UFD, and with _ same PASSWORD and USER, _ utilized in the previous vault of old USB.
Then, in this new SecureAccess, exchange the new vault, by the old vault encrypted (SanDiskSecureAccess Vault, “a file folder full of DAT files”), you have in the old UFD, with copy & paste.
Luck.