Thanks for responding. The AVCHD files have a file extension of .m2ts. In Architect, those files don’t appear in the Explorer tab so I don’t know how to get them into Architect.
*.mpg files do appear, so I changed the extension of one of the AVCHD files to .mpg (since I think it is a type of mpeg file??). The file then showed up in Architect’s Explorer panel, but when I tried to open it I got an error that said it is not a supported file type.
I’ll experiment with having Movie Studio render some other file types that might have a higher bit rate (AVI perhaps?) and then see if Architect will process them.