@kevinushey was this changed with the final version? I have the same issue - even using ODBC, I can't access the 32 bit version of microsoft access using the 64 bit version of R (I have 64 bit windows 10, 32bit access 2016 (which I can't change).
I was really hoping to upgrade to 1.2, but without the ability to use 32bit R, I can't access my databases.
FYI: When I try to setup the connection to the DSN when 64 bit R is connected, I get this error
#setup connection
omni_db <- dbConnect(odbc::odbc(), "Market_Database")
#Error
#Error: nanodbc/nanodbc.cpp:950: IM014: [Microsoft][ODBC Driver Manager] The specified DSN #contains an architecture mismatch between the Driver and Application
Everything works perfectly when using 32bit R.