Run-time error '-2147024882 (8007000e)': Out of memory

[SuperWingedYoshi]

I get the error message in the title every time I did a few level tests and wanna test another level. When I close the error message, the level editor is closed, but changes are still saved before the error message appears. It doesn't matter what kind of levels I test or how long I test them. However, it does depend on the amount of blocks, NPC's etc. the level has. The more of these things there are in the level, the more frequently I get the error.
Any advices? Because this problem is really annoying, and I don't want to have to re-install SMBX...

[zlaker]

I just downloaded SMBX again. That's all I did.

[SuperWingedYoshi]

I just downloaded SMBX again. That's all I did.

Yeah, but as I already said in the first post, this is the last option... If nothing else helps.
Also, I can't be sure if re-installing SMBX is actually going to solve my issue...