File transfer works only with specified suffixes
No, there is no simple solution except run some third party application on your device that accepts any types of files.

Usually Bluetooth implementation on handheld devices limits receving file type to only supported. Such as 3gp, jpg and few others.

Also this days security is a problem so Android may also reject any APK or other risk file types.

So by other words: it is limited by device by security reason.