I installed WinSCP 5.9.3 correctly (Windows 8.1). After that I changed the path to putty and added an "-X" (using Preferences->Application) but I did a mistake; it seems that I deleted the "exe" of "putty.exe" and, perhaps, also went wrong with quotation marks.
However, if I now try to start WinSCP the following error message (in German - I translated it) occurs with the button "OK" and "Help". Independent of the button I press WinSCP does not start. The program only closes. So, I am not able to correct the wrong path to putty. This is the error message:
Error - WinSCP
invalid command '"C:\Program Files\putty\putty.-X'.
In addition, uninstalling WinSCP does not help! That is weird! Even during the uninstall routine the above error message occurs. It seems that WinSCP is not fully uninstalled but all files and directories are deleted as far as I can see. Same error message occurs during the install routine after uninstalling. That's why I guess it's not uninstalled fully. I am still not able to open the program or uninstall and re-install it in a clean version.
Thanks for help!