I was able to avoid having to type in a new password by:
1. First go into the ODBC connection on the main MASCRCW (I think you have to click setup or something) which takes you to the ODBC - on the login tab fill in the company, user , password.
2. Then login regularly in MASCRCW
I was not repeatedly prompted for login. I've found if you don't take the extra step (#`1) then you are repeatedly pestered.
And, yes, as @JimWoodhead points out I think at varying times this has been broken / fixed / broken -- so ymmv (your mileage may vary)...