Is it crashing trying to load the game, or your latest save?
For the game, you could just re-install it, or there is a file verification procedure (for the disk version) in the topic below.
Troubleshooting Tips (& manual install procedure)Try deleting all of the files in the '
..\Divine Divinity\Run\Dynamic' folder. If you have the
patch installed (or you bought a re-release version that was already updated to 1.0034A, as shown in the bottom right corner of the main menu) and reset the configuration files at least once after a crash when prompted, the dynamic folder should already have been cleared.
This folder is used as a cache for the game. Files are created / copied there from the save game folder when you load, and written / copied from that folder when you save a game. The files will be re-created as required the next time you start Divinity. If there was a corrupt file in that folder, deleting the files should fix the problem.
If the problem is loading the save, check the number of files in the saved game folder (in '
..\Divine Divinity\Run\savegames'). Missing files might cause the game to crash when trying to load. A new game should have 22 files, after going to either Verdistis or the Dark Forest it should have 27 and after going to both it should have 32.
One person had a crash in Windows 5 or 10 minutes after exiting the game, and on rebooting Windows decided there was a problem with the (zero byte) inv.b2 file in all the recent saves, and deleted them. Fortunately this file can easily be replaced. Perhaps something similar happened to you, since the save process presumably finished before you started to exit the game.
For the healing stone in Aleroth, you need to finish that before completing the escort quest for the healers or getting an invitation to the castle. In one of the northern houses in Aleroth you can find a magic mirror as well as a book describing its use (between or behind some crates/packages).
You need to drop the mirror in a large pool of water (the puddle SE of Goemoe's house), then when it disappears, drop the healing gem. Don't tell either healer that you have cured their patient until you have cured both of them.
For Tingalf, after you ask him about his supplier, he says something about keeping his goods nearby, or under foot, or something like that. Head to the centre of the Ars Magicana square and take the sewer entrance down, then head east a few steps.
Reputation-list-spoiler