Edit/Mass Edit Powerpoint linked file addresses

As the title suggests I'm looking for a way to manually edit or ideally mass edit the address to linked files in powerpoint. For context I play several games where I need to keep track of what builds I have on which character, and sometimes their in-game inventory. Unfortunately the games don't really have the greatest inventory management for the in-game item side of things. In addition the only way sometimes to remember a character's build is to log onto that character and pull up their build page. With enough characters it can be pain remember what I have where even though I enjoy the games themselves. To get around some of the flaws I have powerpoints I use to keep track of certain things like inventory and build. One ppt may have photos of all the current builds for each character, another may have photos of their inventory and so forth. Certainly not ideal but once the initial setup was done, it's been fairly easy to maintain and I only have to update an odd photo here or there if something changes. Which brings me to my potential issue here. I've been keeping the ppts on a thumb drive along with the photos so I can have everything in one place. Recently the drive decided it was done and checked into that silicone repository in the sky and no longer works. Fortunately however I was able to move everything over to a newer drive before the old one finally checked out. While I was able to save my data, I also introduced 2 side effects I wasn't thinking of at the time in my haste to avoid losing everything. 

When moving everything over I moved things over in batches to avoid taxing the failing drive too hard and placed each batch in its own folder to avoid copying the same thing more than once. So think something like Folder 1, Folder 2, Folder 3, and so on. To conserve on file size of the ppt itself I always chose the option of "Link to File" when inserting the photos to the slides instead of the basic "Insert" or "Insert and Link" options. This means 2 things, the drive location is no longer correct, and the folder location is no longer correct in the links. While I could in theory just change the drive letter and make the folder structure the same again, moving it in batches actually let me organize the raw photos better, but means I now need to correct the addresses for the ppts themselves since the old links no longer work. In the program I know we can go to Info, then press the Edit Links To Files button, and try to change stuff there. The problem is that I can only change one thing at the time there. On top of that if I press the Change Source button, it wants me to find the photo individually vs just chanting the text address of the photo. These wouldn't be issues if it was just a few photos we're talking about as I could just go in, relink by hunting each one and roll. However there are around 250 photos that I would have to do this for, and it would be very tedious. Plus the fact the previews don't work anymore either. (yes i'm one of those kinds of gamers) 

So what I'm hoping you folks can help me with is a way to edit the text addresses manually for the links. Ideally in mass groups, but I can do it one at the time if I have to. For example let's say I have photo one and it's address looks like "D:\Game1\Character Group1\CharacterA\Build1\Photo1" on the old drive. What I want is a way to change it to say "E:\Game1\Batch1\Character Group1\CharacterA\Build1\Photo1" type of thing. Ideally I'm hoping for a way to change those addresses in mass. If I have to text edit them all one by one, that's still alot faster than having to hunt and relink each photo individually. Thanks in advance for any advice.