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I left one of my drawings open last night and Windows updated my system. I am now unable to open the drawing. I tried copying and pasting to another folder but it only opens the previous version without all the changes I had made. Anyone out there that can help me? Thanks.

Check for an autosave of the drawing. Trying to remember but I think it would be in the "Session Backup" folder.

Unfortunately I didn't have the sessions turned on.

Look in the Temporary Folder, If there is a .$wp file, rename to .aec and try to open that one.

No .$wp file available but I still have the auto recovery file. I tried changing the file type to an .aec file but that didn't work.

Thanks to Clayton at Datacad Support! He was able to recover my drawing from an .arb that I sent him. Much appreciate the work he does!