Merge branch 'develop_PDFReaderProNew' of git.kdan.cc:Mac_PDF/PDF_Office into develop_PDFReaderProNew

PDF Office/PDF Master/Class/Purchase/DMG/KMPurchaseEmbeddedWindowController.swift

@@ -693,6 +693,12 @@ class KMPurchaseEmbeddedWindowController: NSWindowController {
                 }
             }
             
+            if pdfCount > 1 {
+                removeButton1.isEnabled = true
+            } else {
+                removeButton1.isEnabled = false
+            }
+            
             if pdfCount > 100 {
                 wechatPayButton2.isHidden = false
                 cardButton.isHidden = true