WASM configuration on first start can take 10min or more on SSD hard drive may take even longer on standard HDD. If you want to check if the WASM has been configured. Launch MSFS at go to options>general settings>developers and enable developer mode. Then select the A310 and spawn at any airport of your preference. Once loaded at the developer mode toolbar on top of the window, select options and locate "display WASM debug window". Open it and locate the ini a310. If it is loaded which for most of us it did not, the dll path should have a folder path specified. For example the image below the a310 did not have dll path and the other wasm module i select for e.g GSX it had proper dll path located. Checks on Microsoft Flight Simulator\Packages\microsoft-aircraft-a310-300 only shows the work folder and nothing else. If the A310 had been configured correctly it should have a bunch of dll cache files inside of nearly 50-200mb in size.