I saved a file with a .asp extension, using Visual Studio 2013. When i opened the file the next day, all of the non-alphanumeric characters were replaced by strings of characters starting with + and ending with -. For example, <%" was replaced by +ADwAJQBA-.
+ACM- seems to be the replacement for !
+ADwAIQ- seems to replace <
so combinations of characters get different replacements than single characters.
1. how do i restore my file?
2. how do i prevent this from happening again?