Hello! Your projects should be safe when uninstalling and reinstalling the Toolkit as they are stored in the game's data folder not the editor folders.
This documentation page will also show you the folders your project data is stored in, in case at any point you wish you make security copies ->
https://docs.baldursgate3.game/inde..._a_New_Mod#Understanding_the_Mod_FoldersEdit: Note that removing the Toolkit Data DLC will remove your mods though, only do this if you've made a copy.
If the issues persist after reinstallation, please make sure to reach out to our support team so they can take a look!