It seems like the change:
I also changed the function create proc to create or replace in admin/initialize-2.tcl. Since this release is incompatible with < 7.2 PG I will check this fix in.
did not make it into the code base since I'm using 4.6.1 release of oacs and having the same problem with ERROR: Relation 'txt' already exists
when installing OpenFTS Driver.
When I manually drop the txt table, the driver install succeeds. I didn't have an older version of OpenFTS installed but had other issues on my install and dropped my OpenFTS driver and reinstalled it. Then I got the error with the txt table existing.