The core of Keyvok is written in C++ and it uses WebView2 for the UI. Password data is stored in an SQLite database and the passwords themselves are encrypted using Windows Data Protection (DPAPI). High entropy 144-bit passwords can be generated, via BCrypt, and used for new accounts. Memory is securely zeroed where possible.
Clicking on an account entry copies the associated password to the clipboard and then the password can be pasted wherever needed. The clipboard is cleared after 30 seconds. Backup to CSV is available, and finally, the setup installer is just 2.5 MB in size.
Keyvok 'Lite' is a free version of this software and it limits the number of accounts to eight. I'm selling Keyvok for a one-time fee of $15. No pesky subscriptions. Please have a look -