fix (i hope) all bugs

src/paths.js

@@ -64,6 +64,22 @@ function ensureDirs() {
   }
 }
 
+// Portable paths: anything stored under FILES/ goes into the registry as a
+// path RELATIVE to FILES (e.g. apps/<id>/game.exe), so moving the whole
+// launcher folder keeps the library working. Absolute paths outside FILES
+// (games left in place) are stored as-is. Resolve on read, normalize on write.
+function toPortablePath(p) {
+  if (typeof p !== 'string' || !p || !path.isAbsolute(p)) return p
+  const rel = path.relative(FILES, p)
+  if (!rel || rel.startsWith('..') || path.isAbsolute(rel)) return p
+  return rel
+}
+
+function resolvePortablePath(p) {
+  if (typeof p !== 'string' || !p || path.isAbsolute(p)) return p
+  return path.join(FILES, p)
+}
+
 function readJson(file, fallback) {
   try {
     return JSON.parse(fs.readFileSync(file, 'utf8'))
@@ -79,4 +95,4 @@ function writeJson(file, data) {
   fs.renameSync(tmp, file)
 }
 
-module.exports = { RESOURCES, APP_ROOT, BUILD, FILES, DATA, DIRS, ensureDirs, readJson, writeJson }
+module.exports = { RESOURCES, APP_ROOT, BUILD, FILES, DATA, DIRS, ensureDirs, readJson, writeJson, toPortablePath, resolvePortablePath }