I guess we're going to have people asking this same question over and over again until everyone has migrated or everyone has read the release notes.
Not meant as an offence to anyone, and maybe Appeon could have done something to avoid people asking this same question over and over... Like, I don't know, an informational warning message when installing the new version that the naming of DLLs have changed to no longer include any version numbers.
Not blaming this on Appeon either, people should read the release notes, though myself I've been guilty many times of not doing that, since there weren't many changes in powerbuilder at this kind of level in the past 20+ years.
regards.