windedit 0.9 WIN can not open file without File Extension name

creat a txt file 123.txt , then rename 123 (with out ext)

open it and Tips Open file failed

Reproduce the failure by creating 123.txt, renaming it to 123, and opening it in WindEdit. No source file or test is named, so trace the file-opening entry point and compare handling of extensionless files with files that have extensions. Done means the renamed file opens successfully without the “Open file failed” message.

Written by the indexing model from the issue text.