MX Simulator

Ok ,, I have downloaded at least 15 bikes from TM factory racing and MX sim forums.. Neither file type works the SAF or JM?? Ive followed youtube instructions when I see them just drag and drop the bike file into their MX sim folder or the user folder.. but when I start mx sim.. not 1 bike is in my inventory.. I tried doing clean installs of mx sim on all 4 of my drives and still no bikes?? I did a clean install of windows 10 64 today and still no bikes??
Is there a certain mod or folder I need to create for custom bikes because just dragging and dropping them does nothing??? I was smart enough to upgrade the stock bikes to 2016 models.. and was able to import every bike in MX Bikes including applying factory skins in 1 day! its been a week of hell trying to get just 1 bike to workin MXS?? and still nothing?? PLEASE HELP???
System specs:
CPU: AMD Ryzen 1700x
Motherboard: ASUS ROG Crosshair VI Hero
Memory: 16gig Gskill Flare-X 3200mhz
Graphics: MSI AMD RX VEGA
Storage: 4- Solid state drives
PSU: EVGA 1300w supernova 80+ gold

Most (recent) bikes are under fc450, sxf450 2017 2016, fc250/ktm250 16/17.

Ok I just tried to re-name the custom bike SAF file to the same format as the 2016 update bikes for example I changed a 2018KawisakiKX450F Stock & CyrcaPowerflow.saf to just kx450f2018.saf and bike is still not in my bike inventory.. I also tried re-naming a 2018 Husky and neither bike is game??

ok,, I got it working ,, the bikes were under bike graphics?? not the actual bike page.. thanks again