Aug 23, 2020 5:27:51 PM com.goofans.gootool.GooTool main
INFORMATION: Launching gootool 1.0.3.441
Aug 23, 2020 5:27:51 PM com.goofans.gootool.GooTool main
INFORMATION: Java version 1.8.0_261 from Oracle Corporation in C:\Program Files\Java\jre1.8.0_261
Aug 23, 2020 5:27:51 PM com.goofans.gootool.GooTool main
INFORMATION: OS Windows 10 version 10.0 on amd64
Aug 23, 2020 5:27:52 PM java.util.prefs.WindowsPreferences
WARNUNG: Could not open/create prefs root node Software\JavaSoft\Prefs at root 0x80000002. Windows RegCreateKeyEx(...) returned error code 5.
Aug 23, 2020 5:27:53 PM com.goofans.gootool.cc a
INFORMATION: Found World of Goo at stored location of "D:\Steam\steamapps\common\World of Goo" at: D:\Steam\steamapps\common\World of Goo
Aug 23, 2020 5:27:55 PM com.goofans.gootool.az a
INFORMATION: Couldn't find the user's profile in any default location
Aug 23, 2020 5:28:08 PM com.goofans.gootool.bW b
INFORMATION: Copying game files from D:\Steam\steamapps\common\World of Goo to C:\Users\main\Downloads\GooToolCopy
Aug 23, 2020 5:28:09 PM com.goofans.gootool.bd run
SERIOUS: runTask com.goofans.gootool.bW threw exception
com.goofans.gootool.v: Addin format exception in island2X:
Addin tries to merge a nonexistent file: properties/fx.xml.xsl
at com.goofans.gootool.bW.a(SourceFile:315)
at com.goofans.gootool.bW.a(SourceFile:58)
at com.goofans.gootool.bd.run(SourceFile:162)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
Caused by: com.goofans.gootool.v: Addin tries to merge a nonexistent file: properties/fx.xml.xsl
at com.goofans.gootool.w.a(SourceFile:102)
at com.goofans.gootool.w.a(SourceFile:67)
at com.goofans.gootool.bW.a(SourceFile:309)
... 5 more

Aug 23, 2020 5:28:09 PM com.goofans.gootool.b b
SERIOUS: Error writing configuration
com.goofans.gootool.v: Addin format exception in island2X:
Addin tries to merge a nonexistent file: properties/fx.xml.xsl
at com.goofans.gootool.bW.a(SourceFile:315)
at com.goofans.gootool.bW.a(SourceFile:58)
at com.goofans.gootool.bd.run(SourceFile:162)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
Caused by: com.goofans.gootool.v: Addin tries to merge a nonexistent file: properties/fx.xml.xsl
at com.goofans.gootool.w.a(SourceFile:102)
at com.goofans.gootool.w.a(SourceFile:67)
at com.goofans.gootool.bW.a(SourceFile:309)
... 5 more

When I try to save, it says "Addin tries to merge a nonexistent file: properties/fx.xml.xsl (com.goofans.gootool.v). This happens everytime I want to save, but only if I have a Mod active. Please help!