I have FF9 Pro.
When I download a filter from the site, FF opens first, but crashes immediately after downloading. On next opening (the filter is already downloaded), everything is OK, I can open any downloaded filters.
From eventlog:
1)
| Code | 
|---|
- <Event xmlns="http://schemas.microsoft.com/win/2004/08/events/event">
 - <System>
   <Provider Name="Application Error" /> 
   <EventID Qualifiers="0">1000</EventID> 
   <Level>2</Level> 
   <Task>100</Task> 
   <Keywords>0x80000000000000</Keywords> 
   <TimeCreated SystemTime="2019-11-21T18:40:42.701533700Z" /> 
   <EventRecordID>10952</EventRecordID> 
   <Channel>Application</Channel> 
   <Computer>Sisinka-PC</Computer> 
   <Security /> 
   </System>
 - <EventData>
   <Data>Filter Forge x64.exe</Data> 
   <Data>9.5.53488.1634</Data> 
   <Data>5dd4ff7c</Data> 
   <Data>Filter Forge x64.exe</Data> 
   <Data>9.5.53488.1634</Data> 
   <Data>5dd4ff7c</Data> 
   <Data>c0000005</Data> 
   <Data>00000000004986c9</Data> 
   <Data>2290</Data> 
   <Data>01d5a09b227ef21f</Data> 
   <Data>C:\Program Files\Filter Forge 9\Bin\Filter Forge x64.exe</Data> 
   <Data>C:\Program Files\Filter Forge 9\Bin\Filter Forge x64.exe</Data> 
   <Data>3068b450-f295-43ed-af11-c0ea6da828b6</Data> 
   <Data /> 
   <Data /> 
   </EventData>
   </Event>
  | 
After 2 sec:
2)
| Code | 
|---|
- <Event xmlns="http://schemas.microsoft.com/win/2004/08/events/event">
 - <System>
   <Provider Name="Application Error" /> 
   <EventID Qualifiers="0">1000</EventID> 
   <Level>2</Level> 
   <Task>100</Task> 
   <Keywords>0x80000000000000</Keywords> 
   <TimeCreated SystemTime="2019-11-21T18:40:44.016360900Z" /> 
   <EventRecordID>10954</EventRecordID> 
   <Channel>Application</Channel> 
   <Computer>Sisinka-PC</Computer> 
   <Security /> 
   </System>
 - <EventData>
   <Data>Filter Forge x64.exe</Data> 
   <Data>9.5.53488.1634</Data> 
   <Data>5dd4ff7c</Data> 
   <Data>Filter Forge x64.exe</Data> 
   <Data>9.5.53488.1634</Data> 
   <Data>5dd4ff7c</Data> 
   <Data>c000041d</Data> 
   <Data>00000000004986c9</Data> 
   <Data>2290</Data> 
   <Data>01d5a09b227ef21f</Data> 
   <Data>C:\Program Files\Filter Forge 9\Bin\Filter Forge x64.exe</Data> 
   <Data>C:\Program Files\Filter Forge 9\Bin\Filter Forge x64.exe</Data> 
   <Data>4ac2cdbe-d830-465c-8240-75e36ab84f8d</Data> 
   <Data /> 
   <Data /> 
   </EventData>
   </Event> | 
Windows 10/Pro/64 Czech, i5-6800K, 16GB RAM, nV1070Ti/8GB VRAM