The win64_save directory name is shared by multiple Capcom games, so the 601150 app directory is essential identity context. Never treat extension/folder-name similarity as cross-title compatibility.
For this PC reference, the documented storage is Windows: <Steam-folder>userdata<account-id>601150remotewin64_save. The known file or folder pattern is Capcom win64_save records for the Steam release. Devil May Cry 5 uses the RE Engine-style Steam userdata remote folder but its data is game-specific. Back up the whole win64_save directory before replacement.
Backup guidance: Close Devil May Cry 5, let the launcher finish any synchronization, then copy the complete documented save directory to a dated folder outside the live path. Preserve companion files rather than selecting only the newest-looking record. Steam Cloud may synchronize this remote folder; close the game and wait for Steam before copying it. Launcher and cloud context matters because The active Steam installation determines which local profile and cloud copy can overwrite the save. Identify the storefront and account before restoring files.
Compatibility and recovery should stay conservative. Treat saves as version-, storefront-, account-, and mod-sensitive unless the game or a separately verified migration workflow proves otherwise. A similar filename or extension is not evidence that two releases are interchangeable. If the expected progress is not visible, If progress is missing after a restore, confirm the active Windows account, storefront/profile, cloud state, and exact directory first. Restore the untouched backup before experimenting with individual files or older autosaves. SaveEditor.com only labels a game-specific editor as available when a separate linked Tool has a verified operational runtime; this reference page by itself is not an editor claim.