diff --git a/chrome/content/zotero/preferences/preferences_search.js b/chrome/content/zotero/preferences/preferences_search.js
index 6dfe000215..51930fd72e 100644
--- a/chrome/content/zotero/preferences/preferences_search.js
+++ b/chrome/content/zotero/preferences/preferences_search.js
@@ -187,13 +187,17 @@ Zotero_Preferences.Search = {
 				var converterVersionAvailable = (!converterIsRegistered ||
 						Zotero.Fulltext.pdfConverterVersion == 'UNKNOWN'
 							|| latestVersion > Zotero.Fulltext.pdfConverterVersion
-							|| (latestVersion != '3.02' && Zotero.Fulltext.pdfConverterVersion == '3.02')
-							|| (latestVersion != '3.02' && latestVersion != '3.04' && Zotero.Fulltext.pdfConverterVersion == '3.04'));
+							|| (!latestVersion.startsWith('3.02')
+								&& Zotero.Fulltext.pdfConverterVersion.startsWith('3.02'))
+							|| (!latestVersion.startsWith('3.02') && latestVersion != '3.04'
+								&& Zotero.Fulltext.pdfConverterVersion == '3.04'));
 				var infoVersionAvailable = (!infoIsRegistered ||
 						Zotero.Fulltext.pdfInfoVersion == 'UNKNOWN'
 							|| latestVersion > Zotero.Fulltext.pdfInfoVersion
-							|| (latestVersion != '3.02' && Zotero.Fulltext.pdfInfoVersion == '3.02')
-							|| (latestVersion != '3.02' && latestVersion != '3.04' && Zotero.Fulltext.pdfInfoVersion == '3.04'));
+							|| (!latestVersion.startsWith('3.02')
+								&& Zotero.Fulltext.pdfInfoVersion.startsWith('3.02'))
+							|| (!latestVersion.startsWith('3.02') && latestVersion != '3.04'
+								&& Zotero.Fulltext.pdfInfoVersion == '3.04'));
 				var bothAvailable = converterVersionAvailable && infoVersionAvailable;
 				
 				// Up to date -- disable update button
diff --git a/chrome/content/zotero/xpcom/fulltext.js b/chrome/content/zotero/xpcom/fulltext.js
index a58247b8ca..fc7976ecf9 100644
--- a/chrome/content/zotero/xpcom/fulltext.js
+++ b/chrome/content/zotero/xpcom/fulltext.js
@@ -339,7 +339,7 @@ Zotero.Fulltext = new function(){
 		
 		case 'info':
 			// Modified 3.02 version doesn't use redirection script
-			if (version == '3.02') break;
+			if (version.startsWith('3.02')) break;
 			
 			var script = Zotero.getZoteroDirectory();
 			script.append('pdfinfo.' + _getScriptExtension())
@@ -600,7 +600,7 @@ Zotero.Fulltext = new function(){
 		cacheFile.append(this.pdfConverterCacheFile);
 		
 		// Modified 3.02 version that can output a text file directly
-		if (_pdfInfo && _pdfInfoVersion == '3.02') {
+		if (_pdfInfo && _pdfInfoVersion.startsWith('3.02')) {
 			var infoFile = cacheFile.parent;
 			infoFile.append(this.pdfInfoCacheFile);
 			
diff --git a/chrome/content/zotero/xpcom/schema.js b/chrome/content/zotero/xpcom/schema.js
index c512936e2c..a9917aea87 100644
--- a/chrome/content/zotero/xpcom/schema.js
+++ b/chrome/content/zotero/xpcom/schema.js
@@ -1606,18 +1606,26 @@ Zotero.Schema = new function(){
 				
 				if (Zotero.Fulltext.pdfInfoIsRegistered()) {
 					let currentVersion = Zotero.Fulltext.pdfInfoVersion;
-					if (currentVersion < availableVersion || currentVersion == '3.02'
+					if (currentVersion < availableVersion || currentVersion.startsWith('3.02')
 							|| currentVersion == 'UNKNOWN') {
 						installInfo = true;
 					}
 				}
+				// Install missing component if one is installed
+				else if (Zotero.Fulltext.pdfConverterIsRegistered()) {
+					installInfo = true;
+				}
 				if (Zotero.Fulltext.pdfConverterIsRegistered()) {
 					let currentVersion = Zotero.Fulltext.pdfConverterVersion;
-					if (currentVersion < availableVersion || currentVersion == '3.02'
+					if (currentVersion < availableVersion || currentVersion.startsWith('3.02')
 							|| currentVersion == 'UNKNOWN') {
 						installConverter = true;
 					}
 				}
+				// Install missing component if one is installed
+				else if (Zotero.Fulltext.pdfInfoIsRegistered()) {
+					installConverter = true;
+				}
 				
 				let prefKey = 'pdfToolsInstallError';
 				let lastTry = 0, delay = 43200000; // half a day, so doubles to a day initially