SpamSieve 2.9.8 won't run in 64-bit mode?

Title says it all. Shows as 32-bit in Activity Monitor. MacBook Pro, Mac OS 10.6.8. SpamSieve installed in Postbox. Even tried launching SS directly, before Postbox. This is slowing my system down… Is there a way to manually override? Nothing I can find in Preferences… Thanks!

SpamSieve runs as 64-bit on Mac OS X 10.7 and later. Mac OS X 10.6’s support for 64-bit apps was (is still?) not as robust. Also, I’m not sure that it’s beneficial to run SpamSieve as 64-bit in that environment. It will use a lot more RAM, and the 32-bit system frameworks will get loaded anyway, e.g. for iTunes.

If you really want to, you could modify the LSMinimumSystemVersionByArchitecture in SpamSieve’s Info.plist file. But this is not a tested configuration, so I cannot guarantee that everything will work properly.