I continue to use KeePass with complete confidence, having had not the slightest hitch with it.
It does have full facilities for importing from csv, to which Lockbox will export, but it may need some adjusting of fields for that. I haven't needed to try to do it. For importing from many current password managers it has direct import facilities.
I suspect that those who have used Lockbox and try out KeePass will find it even better - it already incorporates one of the things I put in Suggestions for Lockbox: the dragging of usernames and passwords straight from the program to the web page that requests them.
I am not given to recommending - what suits one person may not suit another - but I do feel this program is well worth testing out for oneself, and it's a free, open-source program (
https://keepass.info/ ).
Frank