The mod doesn't support 1.0.1, because it was integrated into the release. The only feature that's not there is updating the prices real time. That one, however, was originally not my mod, it's RealTimeFleaMarket from MertCan. We'll discuss where that feature will be updated, in the meantime, you can enjoy selling to flea market in 1.0.1 without the need of this mod.
Also, if you want to change the configs, AkiConfigurator has them.
so it's impossible to sell at the flea market without mod since 1.0.1?