Might be a security/permissions problem then? Try placing the game and save in your user's directory or anywhere else really. Could be that the location is throwing a read/white access block if it's set to for that directory, which happens depending on where it is, something that Windows OS' are particularly shit about. The latest version of Revamp seems to have no issues saving to file and loading from them on my machine. Ran a test with the game file on my desktop, created a test character, saved to desktop, loaded, and everything looks good.
I remember on my older Windows 7 machine it'd fail to load if the location was in either of my program files folders. Keeping it in a folder I made on desktop or in my user folder allowed me to save a load without issues in that case. In another case trying to play Lilith's Throne, a Java-based game, on my current machine the game would boot up briefly then close after a few seconds. The culprit I later discovered was my anti-virus had updated and a new feature that blocks suspecious programs from creating new files would cause a false positive response to the game, thus resulting in it being cock-blocked. All it took was me finding that out and simply adjusting the AV's settings to permit the game to run and have access to it's file location. Literally five-minute fix that took me hours to figure out.