Classic FTP suddenly can't upload

[codingSucks]

I have been using Classic FTP for about two weeks, and there was no problem whatsoever. Until now. I've been uploading PHP and HTML files quiet often, and suddenly, out of nowhere, boom, it doesn't work anymore. More precisely, uploading doesn't change the outcome. I pressed 'Overwrite document' for sure, and Classic FTP says "CWD Command successful". BUT THE OUTCOME NEVER CHANGES!! What is wrong with this application? Or did my server-hosting system has reached the upload-limit or something?

[DannR]

Try doing a clean install and delete all the cache of the program. Uninstall your software first, then go to the folder location below on your computer then delete the Classic FTP  folder folders:

C:\ProgramData\NCH Software
C:\Users\(Your computer profile)\AppData\Roaming\NCH Software\Classic FTP

If you can't find the AppData folder, set Windows to show hidden files and folders with the steps from this link: https://support.microsoft.com/en-us/help/14201/windows-show-hidden-files.

After deleting the Classic FTP folder, restart your computer then install it again from the next link: 

http://www.oldversiondownload.com/oldversions/classicftp-4-00-2019-03-08.exe