[BUG] WinRAR and context menu actions

[fixer]

Some WinRAR context menu actions may misbehave if WinRAR is isolated. For example when adding files to archive current folder is used by default. For isolated WinRAR current folder is usually the folder WinRAR was started from (Program Files by default). It doesn't have enough access rights to create files in this folder, it leads to file creation error window.