update some notes

README.md

@@ -141,8 +141,6 @@ Currently newserv works on macOS, Windows, and Ubuntu Linux. It will likely work
 4. (Optional) If you plan to play Blue Burst on newserv, set up the patch directory. See [client patch directories](#client-patch-directories) for details.
 5. Run the newserv executable.
 
-If you're on an older version of Windows (before Windows 10), the Cygwin libraries included with the release may be incompatible. See [this issue](https://github.com/fuzziqersoftware/newserv/issues/621) for a possible workaround.
-
 ### Linux
 
 There are currently no precompiled releases for Linux. To run newserv on Linux, you'll have to build it from source - see the section below.

src/Episode3/DataIndexes.hh

@@ -605,9 +605,10 @@ struct CardDefinition {
   // actions, and assist cards have 1 here.
   /* 008F */ uint8_t cannot_attack;
   /* 0090 */ uint8_t unused3;
-  // If cannot_drop is 0, this card can't appear in post-battle rewards. A
-  // value of 0 here also prevents the card from being used as a God Whim
-  // random assist.
+  // If cannot_drop is 1, this card can't appear in post-battle rewards and is
+  // considered unobtainable by players, so the game will remove it from the
+  // player's collection if they have any copies of it. A value of 1 here also
+  // prevents the card from being used as a God Whim random assist.
   /* 0091 */ uint8_t cannot_drop;
   // This criterion code specifies who can use the card, and when it can be
   // used. This specifies which Hero-side SCs can use which items, for example,