Change install location if old installation used default location (Program Files/)

问题

Old version of app was installed in /program files/xxx/ (1) or custom location

when installing the new version need to check if old version installed in default location (1)

if so

create /program files/yyy/ (2) and copy the files from old location and continue installation with location (2)

if old version installed in different location continue installation without changing location

any suggestions are welcomed

• how can I check from Inno Script if Old location exist
• how can I create a copy of the old location folder and rename it

Thanks

回答1:

Refer to the documentation here and look under "File System functions" and "File functions".

You should use the DirExists, FileCopy and RenameFile functions for your purposes.

来源：https://stackoverflow.com/questions/4205803/change-install-location-if-old-installation-used-default-location-program-files